[1] UT Hlth San Antonio, Internal Med, San Antonio, UT USA
[2] UT Hlth UHS, Internal Med, San Antonio, UT USA
[3] Univ Texas San Antonio, San Antonio, TX USA
[4] Hosp Univ Getafe, Intens Care Unit, Madrid, Spain
[5] Hosp Univ Getafe, Madrid, Spain
[6] Univ Texas Hlth Med San Antonio, Med Pulm Crit Care, San Antonio, TX USA
[7] Dept Med, Div Pulm Crit Care Med, San Antonio, TX USA