1. Quebec Leukemia Cell Bank and Hematology-Oncology Division; Maisonneuve-Rosemont Hospital; 5415 L'Assomption Blvd., Montréal H1T 2M4 Canada
2. Department of Medicine; Université de Montréal; C.P. 6128, succursale Centre-ville, Montréal H3C 3J7 Canada