1. University of Illinois Hospital & Health Sciences System and University of Illinois Cancer Center, Chicago, IL;
2. Myeloproliferative Disorders Research Consortium, Mount Sinai School of Medicine, New York, NY;
3. New York University School of Medicine, New York, NY;
4. Mount Sinai Medical Center, New York, NY;
5. Weill Cornell Medical College, New York, NY;
6. University of Utah School of Medicine, Salt Lake City, UT;
7. Ospedale San Martino, Genoa, Italy;
8. Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy;
9. Foundation Mario Negri Sud, S. Maria Imbaro, Italy;
10. The Ohio State University Comprehensive Cancer Center, Columbus, OH;
11. Princess Margaret Hospital Cancer Center, Toronto, ON, Canada;
12. Nephro-Urology Hospital Organization, Uddevalla, Sweden;
13. Roswell Park Cancer Institute, Buffalo, NY;
14. University of Florence, Florence, Italy;
15. New York Blood Center, New York, NY; and
16. Istituto Di Ricovero e Cura a Carattere Scientifico Policlinico S. Matteo Foundation, Pavia, Italy