[1] Seoul Natl Univ Hosp, Seoul 110744, South Korea
[2] Taichung Vet Gen Hosp, Taichung, Taiwan
[3] Univ Malaya, Med Ctr, Kuala Lumpur, Malaysia
[4] Natl Lung Hosp, Hanoi, Vietnam
[5] St Marys Hosp Luodong, Luodong, Yilan County, Taiwan
[6] Ewha Womans Univ, Mokdong Hosp, Seoul, South Korea
[7] Inst Resp Med, Kuala Lumpur, Malaysia
[8] Third Mil Med Univ, Xinqiao Hosp, Chongqing, Peoples R China
[9] Khonkaen Univ Hosp, Khon Kaen, Thailand
[10] Pham Ngoc Thach Hosp, Ho Chi Minh City, Vietnam
[11] GlaxoSmithKline, Singapore, Singapore