[1] Univ Basel Hosp, Dept Res, Div Clin Hematol, CH-4031 Basel, Switzerland
[2] Univ Basel Hosp, Div Pneumol, CH-4031 Basel, Switzerland
[3] Univ Basel Hosp, Div Diagnost Hematol, CH-4031 Basel, Switzerland
[4] Univ Pavia, Sch Med, Div Hematol, I-27100 Pavia, Italy
[5] Policlin San Matteo, IRCCS, Pavia, Italy