[1] Shanghai Fifth Peoples Hosp, Dept Pulm & Crit Care Med, Shanghai, Peoples R China
[2] Fudan Univ, Shanghai Emerging & Re Emerging Inst, Shanghai Publ Hlth Clin Ctr, Shanghai, Peoples R China
[3] Univ Pittsburgh, Sch Med, Med Ctr, Pittsburgh, PA USA
[4] Yale Sch Med, Pulm, New Haven, CT USA
[5] Yale Sch Med, Dept Med, New Haven, CT USA
[6] Univ Pittsburgh, Div Pulm Allergy & Crit Care Med, Pittsburgh, PA USA
[7] Fifth Peoples Hosp Shanghai, Dept Resp Med, Shanghai, Peoples R China
[8] Yale New Haven Hosp, New Haven, CT USA
[9] Univ Pittsburgh, Pulm Allergy & Crit Care Med, Med Ctr, Pittsburgh, PA USA