[1] Guangdong Gen Hosp, Guangzhou, Peoples R China
[2] Chinese Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China
[3] Canc Hosp, Chinese Acad Med Sci, Beijing, Peoples R China
[4] Shanghai Chest Hosp, Shanghai, Peoples R China
[5] Bejing Canc Hosp, Beijing, Peoples R China
[6] Bejing Union Med Coll Sch, Beijing, Peoples R China
[7] Shanghai Pulm Dis Hosp, Shanghai, Peoples R China
[8] AstraZeneca, Macclesfield, Cheshire, England
[9] Kinki Univ, Sch Med, Osaka 589, Japan