[1] Ctr Dis Control, Dept Hlth, Taipei 10050, Taiwan
[2] Mackay Mem Hosp, Div Infect Dis, Dept Internal Med, Hsinchu, Taiwan
[3] Chang Gung Univ, Div Pediat Infect Dis, Dept Pediat, Chang Gung Mem Hosp, Taipei, Taiwan
[4] Chang Gung Univ, Coll Med, Taipei, Taiwan
[5] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei, Taiwan
[6] Natl Taiwan Univ, Coll Med, Taipei, Taiwan
[7] Natl Def Med Ctr, Dept Internal Med, Taipei, Taiwan