[1] Gyeongsang Natl Univ, Gyeongsang Natl Univ Hosp, Gyeongsang Inst Hlth Sci, Dept Pediat & Med Educ,Sch Med, Jinju, South Korea
[2] Gyeongsang Natl Univ, Dept Social Welf, Coll Social Sci, Jinju, South Korea
[3] Gyeongsang Natl Univ, Gyeongsang Natl Univ Hosp, Gyeongsang Inst Hlth Sci, Dept Psychiat,Sch Med, Jinju, South Korea
[4] Hallym Univ, Dept Parasitol, Coll Med, Chunchon, South Korea
[5] Chosun Univ, Dept Med Educ, Sch Med, Gwangju, South Korea
[6] Chungnam Natl Univ, Dept Med Educ, Sch Med, Daejeon, South Korea
[7] Chung Ang Univ, Dept Emergency Med, Coll Med, Seoul, South Korea
[8] Pusan Natl Univ, Dept Med Educ, Sch Med, Yangsan, South Korea
[9] Keimyung Univ, Dept Thorac & Cardiovasc Surg, Sch Med, Daegu, South Korea
[10] Kangwon Natl Univ, Dept Thorac & Cardiovasc Surg, Med Sch, Chunchon, South Korea
[11] Korea Univ, Korea Assoc Med Coll, Dept Physiol, Coll Med, Seoul, South Korea
[12] Korea Univ, Dept Med Educ, Coll Med, 73 Goryeodae Ro, Seoul 02841, South Korea