John W. Semple, PhD¹, Edwin R. Speck, BRT^1*, Rukhsana Aslam, PhD^1*, Michael Kim, BSc^1*, Anne Zufferey, PhD^1*, Heyu Ni, MD, PhD², Michelle Catalina, PhD^3* and Richard Francovitch, PhD^3*

¹St. Michael's Hospital, Toronto, ON, Canada
²Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
³Protalex Inc., Florham Park, NJ

Phillip Chae, MD¹, Jay S Raval, MD^2*, Darla Liles, MD³, Yara S Park, MD^2* and Marshall A. Mazepa, MD⁴

¹Department of Hematology/Oncology, East Carolina University, Greenville, NC
²Dept of Pathology and Laboratory Medicine, University of North Carolina Chapel Hill, Durham, NC
³Department of Hematology/Oncology, Brody School of Medicine at East Carolina University, Greenville, NC
⁴Pathology, UNC Chapel Hill, Chapel Hill, NC

Eleni Gavriilaki, MD¹, Arthur Vaught^2*, Nancy Heuppchen^2*, Karin Blakemore^2*, Xuan Yuan, MD, MSc¹, Sara Seifert^2*, Sara York^2* and Robert A. Brodsky, MD¹

¹Division of Hematology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
²Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD

Marina Izak Karaev, MD^1,2,3*, Alexandra Kruse^2*, Margaret Morrisey^2*, Heyu Ni, MD, PhD^4,5, Zhu Guangheng^5*, Petra Pham, MS^3*, W. Beau Mitchell, MD^2,3 and James B Bussel, MD²

¹Hematology, Asaf HaRofeh Medical Center, Zrifin, Israel
²Pediatric Hematology Oncology, Weill Cornell Medical College, New York, NY
³Platelet Biology Laboratory, New York Blood Center, New York, NY
⁴Canadian Blood Services, Canada, St. Michael's Hospital, Toronto, ON, Canada
⁵Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada

Fabio Luiz Bandeira Ferreira^1*, Marina Pereira Colella, MD, PhD^1*, Samuel de Souza Medina, MD^2*, Maiara Marx Luz Fiusa^1*, Loredana Nilkenes Gomes da Costa^1*, Carolina Costa-Lima, MD^1*, Fernanda Andrade Orsi, MD PhD³, Joyce Maria Annichino-Bizzacchi, MD, PhD^1*, Kleber Yotsumoto Fertrin, MD, PhD^3*, Maria de Fatima Pereira Gilberti, M.D.^4*, Margareth C Ozelo^1* and Erich Vinicius De Paula, MD, PhD¹

¹Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil
²Instituto Nacional de Ciência e Tecnologia do Sangue, Hemocentro Unicamp, University of Campinas, Unicamp, Campinas, SP, Brazil
³Faculty of Medical Sciences, Department of Clinical Pathology, University of Campinas, Campinas, SP, Brazil
⁴Department of Clinical Pathology, University of Campinas, Campinas, SP, Brazil

Jennifer Yui, MD^1*, Roshini S Abraham, PhD², Dong Chen, MD, PhD², Fernando Fervenza, MD, PhD^3*, Ronald S. Go, MD⁴, Sanjeev Sethi, MD, PhD^2*, Cheryl Tran, MD^5*, Jeffrey L. Winters, MD², Hatem Amer, MD^3*, Aneel A. Ashrani, MBBS, MSc⁴, Carl Cramer II, MD^3*, Michelle Ann Elliott, MB, BCh⁴, Vesna Garovic, MD^3*, William J Hogan, MBChB⁴, C Christopher Hook, MD⁴, Elizabeth Lorenz, MD^3*, David L Murray, MD, PhD^2*, Juliana Perez Botero, MD⁴, Rajiv K. Pruthi, MBBS⁴, Wendy White, MD^6*, Maria Alice V Willrich, PhD^2* and Nelson Leung, MD^3,4

¹Department of Internal Medicine, Mayo Clinic, Rochester, MN
²Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
³Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN
⁴Division of Hematology, Mayo Clinic, Rochester, MN
⁵Division of Pediatric Nephrology, Mayo Clinic, Rochester, MN
⁶Division of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN

Guillaume Moulis, MD^1*, Alexandra Audermard-Verger, MD^2*, Laurent Arnaud, MD, PhD^3*, Cécile Luxembourger, MD^4*, François Montastruc, MD^5*, Amelia Maria Gaman, MD^6*, Elisabet Svenungsson, MD^7*, Marco Ruggeri, MD⁸, Matthieu Mahévas, MD, PhD^9*, Mathieu Gerfaud-Valentin, MD^10*, Andres Brainsky, MD^11*, Marc Michel, MD,^12,13,14*, Bertrand Godeau, MD, PhD^12,14*, Guy Laurent, MD, PhD¹⁵, Maryse Mapeyre-mestre, MD, PhD^5* and Laurent Sailler, MD, PhD^16*

¹Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-, Toulouse, France
²Internal Medicine Department, Caen University Hospital, Caen, France
³Inserm UMRS 1136, Paris, France
⁴Rheumatology Department, Toulouse University Hospital, Toulouse, France
⁵Clinical and Medical Pharmacology Department, Toulouse University Hospital; UMR 1027 Inserm-University of Toulouse, Toulouse, France
⁶University of Medicine and Pharmacy of Craiova, Filantropia City Hospital, Craiova, Romania
⁷Unit of Rheumatology, Department of Medicine, Karolinska Institutet, Karolinska University Hospital,, Stockholm, Sweden
⁸Department of Hematology, San Bortolo Hospital, Vicenza, Italy
⁹Centre national de référence des cytopénies auto-immunes de l'adulte, Hôpital Henri-Mondor, APHP, Créteil, France
¹⁰Service de Médecine Interne, Hopital de la croix rousse, Lyon, France
¹¹GlaxoSmithKline, Clinical Research, RD Projects Clinical Platforms & Sciences,, Collegeville, PA
¹²Internal Medicine, French referral center for adult's immune cytopenia, Henri Mondor Hospital, AP-HP, UPEC University, Créteil, France
¹³Hôpital Henri-Mondor, APHP, Créteil, France
¹⁴Université Paris Est, Créteil, France
¹⁵CHU Purpan, Service d'Hematologie, Toulouse, France
¹⁶Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-University of Toulouse, Toulouse, France

Jessica A Lake, MD, MPH^1*, Kenneth D Friedman, MD², Veronica H Flood, MD³, Shawn M Jobe, MD, PhD⁴, Rowena Punzalan, MD⁵ and Joan Cox Gill, MD²

¹Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI
²Blood Research Institute, BloodCenter of Wisconsin and Medical College of Wisconsin, Milwaukee, WI
³BloodCenter of Wisconsin, Medical College of Wisconsin, Department of Pediatrics, Milwaukee, WI
⁴Blood Center of Wisconsin, Milwaukee, WI
⁵BloodCenter of Wisconsin, Medical College of Wisconsin, Milwaukee, WI

Valerie Trapp-Stamborski, PhD^*, Stefanie N Dugan, MS, CGC^*, Kenneth D Friedman, MD, Matthew Anderson, MD^* and Rupa A Udani, PhD

BloodCenter of Wisconsin, Milwaukee, WI

James B. Bussel, MD¹, Shah N. Mahmud^2*, Sophie L Brigstocke^2* and Sarah M Torneten, M.A.^2*

¹Division of Pediatric Hematology-Oncology, Weill Cornell Medical College/New York Presbyterian Hospital, New York, NY
²Department of Pediatric Hematology/Oncology, Weill Cornell Medical College/New York Presbyterian Hospital, New York, NY

Xin Yi, PhD^*, Zhiyun Cao, Ph.D.^*, Ina Sandeli, MS^*, Edward KY Leung, Ph.D.^*, Kiang-Teck Jerry Yeo, PhD^* and Jonathan L. Miller, MD, PhD

Department of Pathology, University of Chicago, Chicago, IL

Salim Mezaache^1*, Thibault Comont^2*, Johanne Germain, PhD^1*, François Montastruc, MD^3*, Natacha Brun, MD^4*, Claire Dingremont, MD^5*, Claire Dingremont, MD^5*, Brice Castel, MD^6*, Sophie Arista, MD^7*, Serge Madaule, MD^8*, Philippe Montané de la Roque, MD^9*, Laurent Prudhomme, MD^10*, Laurent Sailler, MD, PhD^11*, Laurent Balardy, MD^12*, Cecile Borel, MD^13*, Stéphane Sire, MD^14*, Guillaume Martin-Blondel, MD, PhD^12*, Laurent Alric, MD, PhD^12*, Miguel Carreiro, MD^15*, Francis Gaches, MD^16*, Patrick Giraud, MD^17*, Maryse Lapeyre-Mestre, MD, PhD^18*, Bertrand Godeau, MD, PhD^19,20*, Odile Beyne-Rauzy, MD, PhD^21*, Daniel Adoue, MD, PhD^22* and Guillaume Moulis, MD^23*

¹UMR 1027 INSERM-University of Toulouse, Toulouse, France
²Department of Internal Medicine, Toulouse University Hospital, Toulouse, France
³Clinical and Medical Pharmacology Department, Toulouse University Hospital; UMR 1027 Inserm-University of Toulouse, Toulouse, France
⁴Rodez hospital, Rodez, France
⁵Tarbes Hospital, Tarbes, France
⁶Lourdes Hospital, Lourdes, France
⁷Auch hospital, Auch, France
⁸Albi Hospital, Albi, France
⁹Pamiers Hospital, Pamiers, France
¹⁰Castres hospital, Castres, France
¹¹Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-University of Toulouse, Toulouse, France
¹²Toulouse University Hospital, Toulouse, France
¹³CHU, Toulouse, France
¹⁴Cahors Hospital, Cahors, France
¹⁵Montauban Hospital, Montauban, France
¹⁶Ducuing hospital, Toulouse, France
¹⁷Pont de Chaume hospital, Montauban, France
¹⁸Service de Pharmacologie Médicale et Clinique, INSERM U 1027, Toulouse, France
¹⁹Internal Medicine, French referral center for adult's immune cytopenia, Henri Mondor Hospital, AP-HP, UPEC University, Créteil, France
²⁰Université Paris Est, Créteil, France
²¹Service de medecine Interne, CHU Purpan, Toulouse, France
²²Internal Medicine, Hopital Purpan, Toulouse, France
²³Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-, Toulouse, France

Peter J Keefe^1*, Margaret C Morrissey, B.S.^1*, Catherine E. McGuinn, MD² and James B. Bussel, MD³

¹Department of Pediatric Hematology/Oncology, Weill Cornell Medical College/New York Presbyterian Hospital, New York, NY
²Division of Pediatric Hematology/Oncology, New York Presbyterian Hospital/Weill Cornell Medical College, New York, NY
³Division of Pediatric Hematology-Oncology, Weill Cornell Medical College/New York Presbyterian Hospital, New York, NY

Aimee Foord, DO^1,2, Janet Hoang^1*, Loan Hsieh, MD^1,2* and Diane J. Nugent, MD^1,2

¹Department of Hematology, CHOC Children's Hospital, Orange, CA
²University of California, Irvine, CA

John C. Chapin, MD¹, James B. Bussel, MD², Christina S Lee^3* and Joseph H Oved^4*

¹Weill Cornell Medical College, New York Presbyterian Hospital, New York, NY
²Platelet Disorders Center, Division of Pediatric Hematology-Oncology, Weill Cornell Medical College, New York, NY
³Pediatrics, Weill Cornell Medical College, New York
⁴New York Presbyterian Hospital, New York

Eric Fountain, MD, MA^1* and Gowthami M Arepally, MD²

¹Duke University Hospital, Durham, NC
²Medicine, Division of Hematology, Duke University Med. Ctr., Durham, NC

Juliana Perez Botero, MD¹, Deepti M. Warad, M.B.B.S.^2,3, Rong He, MD², Rajiv K. Pruthi, MBBS^1,2 and Dong Chen, MD, PhD²

¹Division of Hematology, Mayo Clinic, Rochester, MN
²Division of Hematopathology, Special Coagulation Laboratory, Mayo Clinic, Rochester, MN
³Division of Pediatric Hematology and Oncology, Mayo Clinic, Rochester, MN

Nora Butta, PhD^1*, Ihosvany Fernandez Bello, PhD^2*, María Teresa Álvarez Román, PhD^2*, María Isabel Rivas Pollmar^2*, Miguel Canales² and Victor Jiménez Yuste, PhD^2*

¹Haematology, La Paz University Hospital-IdiPaz, Madrid, Spain
²Haematology, La Paz University Hospital -IdiPaz, Madrid, Spain

Jianghai Zhu, PhD^1,2*, Jieqing Zhu, PhD³, Daniel W. Bougie, PhD³, Richard H. Aster, MD³ and Timothy A. Springer, PhD^1,2*

¹Department of Biological Chemistry and Molecular Pharmacology, and Department of Medicine, Harvard Medical School, Boston, MA
²Program in Cellular and Molecular Medicine, Children’s Hospital Boston, Boston, MA
³Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI

Venkatesh Shreeganesh Ekbote, DM^*, Biju George, DM, Vikram Mathews, DM, Kavitha Lakshmi, MSc^*, Abhijeet Ganapule, DM^*, Fausia N Abubacker, DM^*, Anu Korula, MD, DM^* and Alok Srivastava, MD, FRACP

Department of Haematology, Christian Medical College, Vellore, India