[1] Kunming Med Univ, Affiliated Hosp 1, Dept Pulm & Crit Care Med, 295 Xichang Rd, Kunming 650032, Peoples R China
[2] Kunming Med Univ, 2020 Clin Med Class 6, Kunming 650500, Peoples R China
[3] Kunming Med Univ, Affiliated Hosp 1, Dept Cardiol, Kunming 650032, Peoples R China
[4] Kunming Med Univ, Affiliated Hosp 1, Dept Cardiothorac Surg, Kunming 650032, Peoples R China