1. Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA;
2. Department of Hematology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China; and
3. Department of Hematology and Oncology “L. e A. Seràgnoli,” St Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy