[1] Hanoi Med Univ, Dept TB & Lung Dis, Hanoi, Vietnam
[2] Natl Lung Hosp, Lung Transplantat Ctr, Hanoi, Vietnam
[3] Univ Calif San Francisco, Dept Anesthesia, San Francisco, CA USA
[4] Univ Calif San Francisco, Div Cardiothorac Surg, San Francisco, CA 94143 USA