[1] Infect Dis Sect, Providence Hosp, Dept Med, Washington, DC 20017 USA
[2] Univ Louisville, Sch Med, Div Infect Dis, Louisville, KY 40292 USA
[3] Univ Louisville, Dept Bioinformat & Biostat, Sch Publ Hlth & Informat Sci, Louisville, KY 40292 USA
[4] Univ Milan, Osped Maggiore, Ist Malattie Respiratorie, Milan, Italy
[5] Joan 23 Univ Hosp, Crit Care Dept, Tarragona, Spain
[6] Summa Hlth Syst, Dept Med, Akron, OH USA