[1] Chang Gung Mem Hosp, Kaohsiung Med Ctr, Dept Internal Med, Div Pulm & Crit Care Med, 123 Dapi Rd, Kaohsiung 833, Taiwan
[2] Kaohsiung Med Univ Hosp, Dept Internal Med, Div Pulm & Crit Care Med, Kaohsiung, Taiwan
[3] I Shou Univ, E Da Hosp, Dept Internal Med, Div Pulm Med, Kaohsiung, Taiwan
[4] Kaohsiung Vet Gen Hosp, Div Chest Med, Kaohsiung, Taiwan
[5] Natl Cheng Kung Univ Hosp, Dept Internal Med, Div Chest Med, Tainan, Taiwan