[1] Hosp Univ Puerta Hierro, BMT Programme, Barcelona, Spain
[2] Hosp Univ Puerta Hierro, Myeloid Leukemia Div, Barcelona, Spain
[3] Dana Farber Canc Inst, Div Infect Dis, Boston, MA 02115 USA
[4] Karolinska Univ Hosp, Hematol, Stockholm, Sweden
[5] Univ Texas MD Anderson Canc Ctr, Dept Infect Dis Infect Control & Employee Hlth, Houston, TX 77030 USA
[6] Univ Ziekenhuizen, Hematol, Leuven, Belgium
[7] Tufts Med Ctr, Med, Boston, MA USA
[8] Univ Penn, Infect Dis Div, Perelman Sch Med, Philadelphia, PA 19104 USA
[9] Univ Klinikum Wurzburg, Internal Med, Wurzburg, Germany
[10] Fred Hutchinson Canc Res Ctr, Vaccine & Infect Dis Div, 1124 Columbia St, Seattle, WA 98104 USA
[11] Merck & Co Inc, Late Dev Stat, Kenilworth, NJ USA
[12] Merck & Co Inc, Global Clin Dev Infect Dis, Kenilworth, NJ USA