1. Institut Camille Jordan, UMR 5208 CNRS, University Lyon 1; Villeurbanne 69622 France
2. Division of Hematology/Oncology; Department of Medicine; Vanderbilt University Medical Center; Nashville Tennessee
3. INRIA Team Dracula, INRIA Antenne Lyon La Doua, Villeurbanne 69603, France, and European Institute of Systems Biology and Medicine; Lyon 69007 France