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Studies conducted under the theme of public library health information services mainly focus on the general concept of library-specific information services. They suggest establishing library services for health information through the keyword 'Library Health Information Service.' In addition, we were able to recognize the need for health information services provided by libraries and examine studies suggesting related services and operation methods. Lee (2001) presented a model showing the composition of information integration services specializing in medical information. Song (2006) argued for the continued operation of sites that provide high-quality health information by analyzing the status of online DBs and websites in the domestic health and medical sectors. In order to integrate and systematically provide health-related information in the domestic library community, Noh (2019) proposed the integrated provision of health-related information in the library, such as the establishment of an integrated health information system, the establishment of a comprehensive DB of health-related information, the development and operation of health-specific library programs, the operation of a general support center for health information services, and the establishment of a cooperative network between ministries and institutions related to health information services. Regarding library health information services, there are also studies on Consumer Health Information (CHI) services and librarians' qualifications to enhance the use of health information in public libraries in Korea. Consumer health information refers to helping consumers make decisions about health by analyzing specific health requirements. "Research on Public Library Consumer Health Information (CHI) Service Derived through Document Analysis" (Noh and Oh, 2011), focused on the services of the U.S. and foreign countries. (1) Consumer Health Information (CHI) Service, (2) CHI Reference Service, (3) CHI User Education, (5) Development of CHI Out Search Program, (6) It presented the current status and related cases of each service development. In the "Survey and Analysis on the Provision of Consumer Health Information in Domestic Public Libraries" (Noh, 2011), as a result of deriving implications through prior research analysis and case analysis of CHI services in overseas public libraries, awareness of the provision of CHI services by domestic public libraries is very low. (2) It provides only three services: provision of CHI-related websites, education for users, and public relations and marketing. (3) There is no office in charge of CHI, and public library librarians do not receive CHI-related education. (4) There were no CHI services related to outreach, ILL services, and cooperative networks with related institutions, including medical institutions. Therefore, it was argued that research on how to provide CHI services in domestic public libraries should be activated. Meanwhile, Noh (2014) surveyed the current status of public and medical libraries providing health and medical services to explore ways to revitalize library services. Studies show that librarians in public libraries feel the limits of information resources very high compared to librarians in medical libraries. The data service mainly provided by public libraries was related to book loans. The rest used medical journals, reference information centers, and website information sources at a low rate. In addition, Noh (2013) studied the academic background, career, and duties that health information librarians should have based on job site analysis to determine the role of subject librarians in health information on the qualifications of librarians for library health information services. As a result, it was determined that the name of the medical librarian was appropriate for the public library, the hospital library, and the medical library.

Since the previous studies are about the health information services of domestic libraries, we will investigate the contents of the health information services of overseas libraries and reflect them in the contents of the Health Information Integration Service Model proposed in this study. Lee (2010) looked at the trends and characteristics of mental health support services of public libraries in North America and found that public libraries in the region support the mental health problems of residents. In response, the library was supporting the mental health problems of residents as part of independent counseling and information services, including services to help overcome the shock, anxiety, and stress of residents in the event of a national tragedy or natural disaster. In particular, there was active support for various problems such as self-respect, emotions, and diseases that emerged in the growth process of children and adolescents. In addition, it has been investigated that it is guiding and connecting related information and specialized institutions. Lee (2019) investigated the health information services of overseas hospital libraries (general hospitals, professional hospitals, women's hospitals, children's hospitals, veterans' hospitals). It led to the need to establish domestic hospital libraries, change the perception of health information services, support the curriculum and the association to foster human resources and continuing education, and link with related institutions to mandate and diversify health information services in hospitals libraries.

But it is still possible to take a general look at the provision of health information services in specialized libraries related to medicine and health, rather than providing health and medical information needed in daily life in public libraries. According to the contents of the Medical Association (MLA) website, even the National Library of Medicine (NLM), the 'world's most extensive biomedical library, provides vast amounts of medical and health-related databases through open access. In other words, there is no living health information available in public libraries. The types of Health Sciences Libraries offered on the MLA website are as follows.

• ∙ Academic health science centers including schools of medicine, nursing, pharmacy, dentistry, chiropractic, veterinary medicine, public health
• ∙ Special libraries such as cancer treatment centers
• ∙ Hospital libraries
• ∙ Libraries serving large physician group practices
• ∙ Corporate libraries, including pharmaceutical and device manufacturing companies, insurance companies
• ∙ Community college libraries serving the associated health professions

However, public libraries are places where people often encounter them and are obliged to provide users with the helpful information in their daily lives. It is necessary to reduce the inconvenience of library users who have to use medical libraries to obtain information on living healthy. Therefore, this study aims to provide a solution for users to get information on healthy lifestyle formation in public libraries quickly.

The public library plays a role as an informal institution that provides various education and information resources to users and actively processes users' information needs. The specialized information service applied to this is a concept that maximizes users' needs and satisfaction by providing differentiated services by selecting specialized areas. In other words, it means introducing a customized information service concept that meets the needs of users. It also includes analyzing the community for each library and developing specialized programs for each subject. In some cases, it also develops a program that reflects the situation and concerns of each age group. Therefore, the specialized information service of a public library refers to the effective response to the diverse needs of users by selecting information in a specific field and providing professional services (Park, 2007). We can assume that the models can be referred to about specialized information services of public libraries through related papers. Noh et al., (2020) presented models on the composition of specialized themes for each library in Gimpo. It was pointed out that specialized materials were not organized with contents that residents would be interested in or that the utilization rate of the Gimpo-si Specialized Library was low. Accordingly, the study proposed reducing, expanding, and merging the contents of the existing specialized materials. In addition, Lee (2001) presented the composition of information integration services specializing in medical information in the same model like Fig. 2. A web-based information integration service model was presented under the name of the "Integrated Knowledge Management System" to use information sources from various media anytime, anywhere if they are connected to the Internet. The system proposed providing an information integration service consisting of five sub-systems as a regional information center for public libraries. In other words, the knowledge creation system is in charge: knowledge resource management, the technical support system consists of information technology development, the education support system consists of human resource management, the community system consists of user services, and the knowledge sharing network system consists of resource sharing and knowledge networks.

Fig. 2. 
Health Information Integrated Management System Model

As modern people have become accustomed to using the Internet and show high interest in health issues, they can check the Internet-based quick information search and the results themselves. The purchase of over-the-counter medicines or medical devices, which can be easily purchased without prescription by a specialist, is becoming more frequent, trusting the folk remedies shown on health information sites. It is now possible to request Internet counseling or search for medical information before visiting a hospital to act as a doctor on its own. Due to active self-diagnosis, more than 10,000 health and medical websites are currently registered among major portal sites in Korea. More than 3,000 questions are posted on health-related service bulletin boards. However, if we worry about health more than necessary and make an inaccurate self-diagnosis, there is a risk of interpreting it only as health knowledge on the Internet. Therefore, the data collected from the website and the management and operation thereof should consider the following matters: First of all, data collection shall be organized in consideration of the wide range of information used in public libraries. For example, it is composed of information that is general and deemed necessary for users. It also selects and provides information that is easy for anyone to understand but of high quality and selects information considering the latest and accuracy. In addition, it consists of various types of information such as books, journals, papers, and web materials. In particular, data that is important or valuable among the collected web information sources will be stored as a database so that users can provide the information as soon as they want, even if the website disappears in the future.

Meanwhile, the operation of a health information website operated by public libraries makes it easier for users to use and allows users to exchange information among librarians freely, outsiders(authors, experts), and share information through bulletin boards or e-mail addresses the function of providing information. It also regularly analyzes users' information usage behavior, prepares questions that users in FAQ frequently ask, and collects health information categories that are frequently used separately to make recommendations by theme (Lee, 2001). Before proposing Library Health Information Integration Services, health, and medical-related websites were selected and surveyed by dividing them into ‘specialized sites,' ‘government sites,' ‘public sites,' and ‘overseas sites'(see Table 1). Based on the characteristics of the websites shown in ‘Table 1,’ it can be seen that they mainly perform three functions: ‘Provision of Medical Information,' ‘Medical Expert Counseling,' and ‘Library Health Information Service.' First, librarians build and operate the library website to enable various health and medical information through convenient information search. Secondly, enable real-time one-on-one diagnosis or self-diagnosis with medical experts. Thirdly, provide informati on on medical facilities in the community, health courses and related events hosted by major medical institutions, links to medical-related search sites, and send the library's specialized health and medical service newsletter by e-mail to users. Suggesting the implications by revealing the main characteristics of each site area is as follows. In specialist-related sites, they can quickly provide professional medical information, provide medical counseling services and discuss medical issues, and provide self-diagnosis for health care. Government agency sites may organize and check the helpful information, online reservations, facility evaluation information, health courses, and events of public service institutions in the medical sector, such as hospitals, pharmacies. At a glance, and medical information may be obtained through counseling with overseas travel. Popular sites briefly provide health and medical information in daily life and mailing services that provide health information, medical dictionary, disease encyclopedias, and counseling with specialists. Unlike domestic sites, overseas sites focused on providing personalized services. For example, services such as health-related DDC classification methods, search and index services, building personalized files, selecting and recommending data they are interested in, and personal health scorecards were provided.

As reflecting on the information mentioned above, this research looked for the elements needed to organize the health information website, and the contents are as shown in Table 2.

Implications derived from a comprehensive analysis of factors necessary for the composition of health information integration services in public libraries in case studies are as follows. First, librarians can see that they use various communication media with users online and offline to strengthen personalized information services further. Second, the library is building its specialized services and program contents into a web database in order to provide users with technical information as a whole. Third, it is becoming possible for health and medical professionals to consult with users in real-time remotely. It is being used to provide comprehensive information and specialized information services at libraries and websites. Fourth, the library is used to freely exchange information for various users, including librarians, users, authors, and experts, while providing quality technical information comprehensively. Therefore, this study proposes an integrated information service model in which public libraries perform all the roles mentioned in the implications to present specific systems for operating and activating specialized information services.

Based on the implications derived from the case study, the following library health information integration service model (see Fig. 3) was proposed. This model allows librarians, users, and health and medical experts to freely share health and medical information through libraries (offline) and websites (online). The model's characteristic first reflected the fact that information can be used in the library without restrictions on the type of information source. Second, it consists of a configuration that allows users and other libraries to freely use both information and external sources inside the library without time and space constraints. The website serves as a medium for connecting the elements. Third, thanks to the feature of sharing the library's internal and external information resources online and offline. Users can receive most Library Health Information Integration Services online and receive personalized information services directly from librarians and experts in the specialized information field. In other words, if users have access to a lot of non-electronic data related to health and medical information or want direct information counseling, they can use it offline. If they want to access more online information resources related to health and medicine outside the library, they can use them online.

Fig. 3. 
Library Health Information Integration Service Model

The role of each subject, such as librarians, health and medical experts, and users, in libraries and websites, is as follows: First, librarians are experts in all kinds of information, but they also play a role in improving the quality of information services in health and medicine. By serving as a theme librarian in the field of health alternative medicine, the librarian operates internal websites and library programs on the library's website, which deals with research counseling and specialized topics related to health and medical information. It also forms a maker space dedicated to professional medical centers and researchers to form external health and medical information network. Second, health and medical experts serve as “Human Book" for one-on-one remote consultations with library users Experts in the form of human books mentioned here are only for those who are registered as human books with volunteer applications. In addition, experts can work with librarians to improve the quality of library-specific information services by contributing to the composition of specialized information content related to health and medicine in the library. Third, users can use the comprehensive information provided by the library and reliable specialized information organized by librarians and experts in the health and medical fields diversely and conveniently. In offline, users can use information directly through librarians, experts, electronic and non-electronic information resources, or find real-time information counseling and various online information resources outside the library through the Internet and smartphone apps online.

Fig. 4. 
Role Composition by Subject of Library Health Information Integration Service

The composition of the Library Health Information Integration website proposed in this study is shown in Fig. 5. It is assumed to be operated as an internal website of the main website of the public library. Apart from the main website of the public library, it is to provide professional information on the subject by operating an internal website. The website's composition is divided mainly into three broad categories: e-Medical Information, e-Medical Experts, and e-Health Information Services. Each field consists of 12 subdivisions, four subdivisions, and details refer to the items proposed as the main menu of the medical information site in Table 2. It was classified according to the degree of information expertise required by the user, except for “e-Health Information Service," which focuses on the library contents or services. The “e-Medical Information" was divided when searching and using general health and medical information that can be easily accessed daily. The “e-Medical Expert" was divided based on cases where professional health and medical information are needed, or consultation with related specialists and librarians is needed. First, ‘e-Medical Information can be seen as passive use of information. It obtains practical information just by searching and using it, and the detailed composition is as follows. “News" introduces health and medical news. The “Oriental Medical Dictionary" is a dictionary that introduces thought medicine and folk remedies that can be used in daily life, and the “Disease Dictionary" is a dictionary of definition, cause, symptoms, treatment, and prevention by types of diseases. In addition, “Related Sites” provide health and medical sites by type.

Fig. 5. 
Library Health Information Integration Website Composition Map

Second, the ‘e-medical expert' can be regarded as an active form of information. It can obtain professional information by directly consulting with experts to use the information according to the user's situation, and the detailed composition of the menu is as follows. “Professionals Counseling" provides one-on-one consultation with specialists and counseling on bulletin boards. In contrast, “Self-Diagnosis" provides an in-depth disease diagnosis checklist to help users prevent diseases in advance. At the same time, the “Bulletin Board" can freely express users' suggestions or provide research consultations on health and medical information with librarians. The “Medical Terminology Dictionary” menu is also a dictionary that introduces professional medical terms. Third, the detailed composition of 'e-library health information service is as follows. "Introduction" introduces users who want to know about health information integration services, "New Books" provides medical books with guidance and release, and “Issue Topic" provides noteworthy health and medical information. Moreover, “Site Map” connects not only website menus but also websites of the library.