[1] Univ Childrens Hosp, Ctr Bone Marrow Transplantat, Infect Dis Res Program, Albert Schweitzer Campus 1, D-48129 Munster, Germany
[2] Univ Childrens Hosp, Dept Pediat Hematol Oncol, Albert Schweitzer Campus 1, D-48129 Munster, Germany
[3] Aristotle Univ Thessaloniki, Fac Hlth Sci, Sch Med, Dept Pediat 3,Infect Dis Unit, Thessaloniki, Greece
[4] Hippokrateion Hosp, Thessaloniki, Greece
[5] Ctr Innovat Therapeut & Diagnost, Richmond, VA USA
[6] Univ Maryland, Sch Med, Baltimore, MD 21201 USA