[1] Eulji Univ, Dept Healthcare Management, Seongnam, South Korea
[2] Univ Groningen, Univ Med Ctr Groningen, Groningen, Netherlands
[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] NIH, Ctr Clin, Bethesda, MD 20892 USA
[6] Kyung Hee Univ, Sch Med, Dept Prevent Med, Seoul, South Korea
[7] Seoul Womens Univ, Dept Social Welf, Seoul, South Korea