[1] Natl Taiwan Univ, Coll Publ Hlth, Inst Epidemiol & Prevent Med, Taipei 10764, Taiwan
[2] Buddhist Tzu Chi Gen Hosp, Dept Obstet & Gynecol, Taichung Branch, Taichung, Taiwan
[3] Natl Taiwan Univ, Res Ctr Genes Environm & Human Hlth, Coll Publ Hlth, Taipei 10764, Taiwan
[4] Acad Sinica, Inst Stat Sci, Taipei 11529, Taiwan
[5] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei 100, Taiwan
[6] Natl Taiwan Univ Hosp, Dept Geriatr & Gerontol, Taipei, Taiwan