[1] Pusan Natl Univ, Dept Family Med, Sch Med, Yangsan, South Korea
[2] Pusan Natl Univ, Dept Prevent Med, Sch Med, Yangsan, South Korea
[3] Pusan Natl Univ, Dept Med Educ, Sch Med, Yangsan, South Korea
[4] Pusan Natl Univ, Dept Family Med, Yangsan Hosp, Yangsan, South Korea
[5] Pusan Natl Univ, Res Inst Convergence Biomed Sci & Technol, Yangsan Hosp, Yangsan, South Korea
[6] Kosin Univ, Dept Family Med, Coll Med, Busan, South Korea
[7] Kosin Univ, Dept Med Educ, Coll Med, Busan, South Korea
[8] Inje Univ, Dept Family Med, Coll Med, Busan, South Korea
[9] Dong A Univ, Dept Infect Med, Coll Med, Busan, South Korea
[10] Dept Family Med, Dong A Univ, Coll Med, Busan, South Korea