[1] Chonnam Natl Univ, Med Sch, Dept Urol, Gwangju 61469, South Korea
[2] Chonnam Natl Univ, Med Sch, Dept Psychiat, Gwangju 61469, South Korea
[3] Chonnam Natl Univ, Med Sch & Hosp, Dept Phys & Rehabil Med, Gwangju 61469, South Korea
[4] Chonnam Natl Univ, Med Sch, Dept Prevent Med, Hwasun 58128, South Korea
[5] Chonnam Natl Univ, Adv Inst Aging Sci, Gwangju 61469, South Korea