Suzan Imren, MD^*, Michael Heuser, MD^*, Ling-Yi Chen^*, Glen Edin^*, Connie J. Eaves, PhD^* and R. Keith Humphries, MD, PhD

Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, BC, Canada

Jinjun Dang, PhD^1*, Charles G Mullighan, MBBS(Hons), MSc, MD¹, Letha A. Phillips, BS^1*, Perdeep Mehta, PhD^2* and James R. Downing, MD^1*

¹Pathology, St. Jude Children's Research Hospital, Memphis, TN
²Hartwell Center, St Jude Children's Research Hospital, Memphis, TN

Christopher Y. Park, MD, PhD¹, Yoon-Chi Han, Ph.D.^2*, Govind Bhagat, M.D.^3*, Jian-Bing Fan, Ph.D.^4*, Irving L Weissman, M.D.^1* and Hua Gu, Ph.D.^2*

¹Institute for Stem Cell Biology & Regenerative Medicine, Stanford University School of Medicine, Palo Alto, CA
²Microbiology, Columbia University College of Physicians and Surgeons, New York, NY
³Pathology, Columbia University College of Physicians and Surgeons, New York, NY
⁴Illumina, Inc., San Diego, CA

Piu Wong^1*, Masayuki Iwasaki^2*, Chang-Zheng Chen, PhD³ and Michael Cleary, MD⁴

¹Whitehead Insitute for Biomedical research, Cambridge, MA
²Stanford University, Stanford
³Baxter Lab. of Genetic Pharmacology, Stanford Univ. School of Med., Stanford, CA
⁴Stanford University Med. Ctr., Stanford, CA

Adelheid Bursen, PhD^1*, Karen Schwabe^1*, Brigitte Rüster, PhD^2*, Anne Wenger, PhD^3*, Martin Ruthardt, MD^4*, Reinhard Henschler, MD², Theo Dingermann, PhD^1* and Rolf Marschalek, PhD^1*

¹Institute of Pharmaceutical Biology / DCAL / ZAFES, Goethe-University of Frankfurt, Frankfurt/Main, Germany
²Institute for Transfusion Medicine and Immunohaematology, Blood Transfusion Centre of the German Red Cross, Frankfurt/Main, Germany
³Centre d'Immunologie de Marsaille-Luminy, Marsaille, France
⁴Department of Internal Medicine II, Haematology, Goethe-University of Frankfurt, Frankfurt/Main, Germany

Kim L. Rice, Ph.D.^1*, Itsaso Hormaeche, Ph.D.^1*, Melanie J. McConnell, Ph.D.², Sergei Doulatov, B.S.^3*, Jared Flatow, M.S.^1*, David Grimwade⁴, Ken I Mills, Ph.D., FRCPath⁵, John E. Dick, PhD⁶ and Jonathan D. Licht, MD¹

¹Hematology/Oncology, Northwestern University, Chicago, IL
²Cancer Cell and Molecular Biology, Malaghan Institute of Medical Research, Wellington South, New Zealand
³Dept of Molecular and Medical Genetics, Toronto General Research Institute, Toronto, ON, Canada
⁴Dept of Medical & Molecular Genetics, King's College London School of Medicine, London, United Kingdom
⁵Centre for Cancer Research and Cell Biology, Queen's University Belfast, Belfast, United Kingdom
⁶University Health Network, Toronto, ON, Canada

Daniela Cilloni, MD, PhD¹, Sonia Carturan, PhD^2*, Enrico Bracco, PhD^3*, Ilaria Defilippi, PhD^2*, Chiara Maffč, PhD^4*, Ilaria Iacobucci^5*, Marisa Pautasso, MD^3*, Antonia Rotolo^6*, Emilia Giugliano, PhD^3*, Emanuela Messa, MD^6*, Giovanni Martinelli, MD^7* and Giuseppe Saglio, MD³

¹dept of Clinical and Biological Sciences, University of Turin, Turin, Italy
²Department of Clinical and Biological Sciences, University of Turin, Orbassano,Turin, Italy
³Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
⁴Dept. Of Clinical and Biological Sciences, University of Turin, Turin, Italy
⁵Department of Hematology and Oncological Sciences "L. e A. Serągnoli", University of Bologna, Bologna, Italy
⁶Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy
⁷Department of Hematology and Oncological Sciences, University of Bologna, Bologna, Italy

Kamaleldin E Elagib^*, Lorrie L Delehanty^* and Adam Goldfarb

Department of Pathology, University of Virginia, Charlottesville, VA