1. Osaka City Gen Hosp, Osaka, Japan; Graduate Sch of Medicine, Osaka City Univ, Osaka, Japan; Kinki Univ Sch of Medicine, Osaka-Sayama, Japan; Rinku Gen Medcl Ctr, Izumisano, Japan; Kobe City Gen Hosp, Kobe, Japan; Osaka Prefectural Medcl Ctr for Respiratory, Habikino, Japan; Kyoto Univ Health Service, Kyoto, Japan