[1] Samsung Med Ctr SMC, Div Pulm & Crit Care Med, Seoul, South Korea
[2] Ewha Womans Univ, Mokdong Hosp, Thorac Surg, Sch Med, Seoul, South Korea
[3] Sungkyunkwan Univ, SAIHST, Samsung Med Ctr SMC, Sch Med, Seoul, South Korea
[4] Sungkyunkwan Univ, Samsung Med Ctr, SAIHST, Dept Clin Res Design & Evaluat,Sch Med, Seoul, South Korea
[5] Samsung Med Ctr SMC, Patient Ctr Outcomes Res Inst, Seoul, South Korea
[6] Sungkyunkwan Univ, Thorac Surg, Samsung Med Ctr SMC, Sch Med, Seoul, South Korea
[7] Samsung Med Ctr SMC, Thorac & Cardiovasc Surg, Seoul, South Korea