[1] Eulji Univ, Dept Healthcare Management, Seongnam, South Korea
[2] Eulji Univ, Inst Global Healthcare Res, Seongnam, South Korea
[3] Catholic Univ Korea, Coll Med, Dept Humanities & Social Med, Seoul, South Korea
[4] Catholic Univ Korea, Catholic Inst Healthcare Management, Seoul, South Korea
[5] Seoul Bukbu Hosp, Dept Publ Healthcare Serv, Seoul, South Korea
[6] Hallym Univ, Hangang Sacred Heart Hosp, Dept Internal Med, Div Endocrinol & Metab, Seoul, South Korea
[7] Korea Univ, Coll Med, Dept Internal Med, Div Endocrinol & Metab, 73 Inchon Ro, Seoul 02841, South Korea