Sumita Ratnasingam, MBBS^1*, Patricia A. Walker, MBBS^2,3, Huy Tran, MBBS^3*, Zane Kaplan, MD¹, James David McFadyen, MD^2*, Huyen Tran, MD^2*, Tse-Chieh Teh, MD^2*, Erica M. Wood, MD^1,4*, John V. Catalano, MD³, Stephen Opat, MBBS^1,5 and Jake Shortt, MD^1,5

¹Department of Haematology, Monash Health, Melbourne, Australia
²Department of Haematology, Alfred Health, Melbourne, Australia
³Department of Haematology, Peninsula Health, Melbourne, Australia
⁴Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
⁵School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing & Dentistry, Monash University, Melbourne, Australia

M. Badin, BSc^1*, C. P.M. Hayward, MD, PhD², S. Tasneem, PhD^1*, G. Pare, MD, MSc^3*, A. D. Paterson, MD^4* and J. Waye, PhD^1*

¹McMaster University, Hamilton, ON, Canada
²Medicine, Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
³Department of Medicine, McMaster University, Hamilton, ON, Canada
⁴The Hospital for Sick Children, Toronto, ON, Canada

Louis M. Aledort, MD¹, Lisa Boggio, MD², Joanna A. Davis, MD³, Cynthia Gauger, MD^4*, Nathan L. Kobrinsky, MD, FRCP^5*, Anita Rajasekhar, MD, MS⁶, Ralph Shapiro, MD^7*, Marcela Torres, MD⁸ and Paula J. Ulsh, RN, BSN^9*

¹Mount Sinai Hospital, New York, NY
²Rush University Medical Center, Chicago, IL
³University of Miami School of Medicine, Miami, FL
⁴Nemours, Jacksonville, FL
⁵Sanford Roger Maris Cancer Center, Fargo, ND
⁶University of Florida - Shands Hospital, Gainesville, FL
⁷Midwest Immunology, Plymouth, MN
⁸Cook Children's Hospital, Fort Worth, TX
⁹Kedrion Biopharma, Fort Lee, NJ

Matthieu Mahévas, MD, PhD^1,2*, Mathieu Gerfaud-Valentin, MD^3*, Guillaume Moulis, MD^4*, Louis Terriou, MD^5*, Sylvain Audia^6*, Sophie Guenin^7*, Guillaume Le guenno^8*, Gilles A. Salles, MD, PhD⁹, Corinne Haioun, MD¹⁰, Olivier Lambotte, MD, PhD^11*, jean-François Viallard^12*, Stéphane Cheze, MD, PhD^13*, Cecile Tomowiak, MD^14*, Bruno Royer, MD^15*, Odile Debouverie^16*, Arnaud Hot^17*, Isabelle Durieu^18*, Antoinnette Perlat^19*, Mohamed Hamidou, MD, PhD^20*, Nicolas Limal, MD^2*, Marc Michel, MD,^21* and Bertrand Godeau, MD, PhD^21*

¹Université Paris Est, Créteil, France
²Centre national de référence des cytopénies auto-immunes de l'adulte, Hôpital Henri-Mondor, APHP, Créteil, France
³Service de Médecine Interne, Hopital de la croix rousse, Lyon, France
⁴Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-, Toulouse, France
⁵Department of Internal Medicine, Hôpital HURIEZ CHRU Lille, Lille, France
⁶Service de Médecine Interne et Immunologie Clinique, DIJON, France
⁷Service de Médecine Interne, Centre de référence des cytopénies auto-immunes de l’adulte, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Creteil, France
⁸Service de médecine Interne, CHU Clermont-Ferrand, Clermont-Ferrand, France
⁹Hospices Civils de Lyon, University Claude Bernard, Pierre-Benite, France
¹⁰Service d'Hématologie Clinique, Hopital Henri Mondor, Créteil, France
¹¹Department of Internal Medicine, University Hospital Paris Sud, Assistance Publique Hôpitaux de Paris, Le Kremlin Bicêtre, France
¹²Service de médecine interne, CHU Bordeaux, Bordeaux, France
¹³Institut d’Hématologie de Basse-Normandie, CHU Caen Hôpital Côte de Nacre, Caen, France
¹⁴CHU, Poitiers, France
¹⁵Hematology, Centre Hospitalier Universitaire, Amiens, France
¹⁶Service de médecine Interne, Poitiers, France
¹⁷Service médecine Interne CHU Edouard heriot, Lyon, France
¹⁸Médeciene Interne, Lyon Sud, Lyon, France
¹⁹Service de médecine Interne, rennes, Rennes, France
²⁰Department of Internal Medicine, Hôtel Dieu University Hospital, Nantes, France
²¹Internal Medicine, French referral center for adult's immune cytopenia, Henri Mondor Hospital, AP-HP, UPEC University, Créteil, France

Grace M. Lee, MD¹, Manali Joglekar, MS^2*, Sanjay Khandelwal^2*, Rui Qi, BS^2*, Lubica Rauova, MD, PhD^3,4 and Gowthami M Arepally, MD¹

¹Medicine, Division of Hematology, Duke University Med. Ctr., Durham, NC
²Duke University Medical Center, Durham, NC
³Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, PA
⁴Department of Pediatrics, University of Pennsylvania, Philadelphia, PA

Silvia Cantoni, MD^1*, Monica Carpenedo, MD^2*, Maria Gabriella Mazzucconi, MD^3*, Valerio De Stefano, MD^4*, Marco Ruggeri, MD⁵, Nicola Vianelli, MD^6*, Francesco Zaja⁷, Wilma Barcellini, MD^8*, Michele Nichelatti^9*, Veronica Coccini, MD^2*, Erminia Baldacci^10*, Elena Rossi, MD^11*, Simona Puglisi^7*, Angela Ciminello, MD^11* and Roberto Cairoli, MD^12*

¹Department of Hematology, Niguarda Hospital, Milan, Italy
²Hematology and Transplant Unit, San Gerardo Hospital, Monza, Italy
³Centro Regionale di Riferimento per l’Emofilia e Sindromi Correlate, Università Sapienza, Policlinico Umberto I, Rome, Italy
⁴Hematology, Catholic University, Rome, Italy
⁵Department of Hematology, San Bortolo Hospital, Vicenza, Italy
⁶Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
⁷DIRM Clinica Ematologica, Azienda Ospedaliero Universitaria di Udine, Udine, Italy
⁸Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
⁹Service of Biostatistics, Niguarda Ca’ Granda Hospital, Milan, Italy
¹⁰University of Rome “Sapienza”, Department of Cellular Biotechnologies and Hematology, Rome, Italy
¹¹Institute of Hematology, Catholic University, Rome, Italy
¹²Division of Hematology, Niguarda Ca' Granda Hospital, Milan, Italy

Kruti Sheth, MD¹, Raffaele Girlanda, MD^2* and Catherine Broome, MD¹

¹Hematology/Oncology, MedStar Georgetown University Hospital, Washington, DC
²Transplant Institute, MedStar Georgetown University Hospital, Washington, DC

Yang Song^1*, Yu-tong Wang^2*, Xiao-jun Huang^1,2 and Yuan Kong, MD, PhD^2*

¹Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
²Peking University People's Hospital, Peking University Institute of Hematology, Beijing Key Laboratory of HSCT, Beijing, China

Anne Zufferey, PhD^*, Edwin R. Speck, BRT^*, Li Guo, MD, Rukhsana Aslam, PhD^*, Rick Kapur, MD, PhD^* and John W. Semple, PhD

St. Michael's Hospital, Toronto, ON, Canada

Kruti Sheth, MD¹, Raffaele Girlanda, MD^2* and Catherine Broome, MD¹

¹Hematology/Oncology, MedStar Georgetown University Hospital, Washington, DC
²Transplant Institute, MedStar Georgetown University Hospital, Washington

Michael D Tarantino, MD^1,2, James B. Bussel, MD³, Victor S. Blanchette, MD, FRCP⁴, Jenny M. Despotovic, DO, MS⁵, Carolyn Bennett^6*, Ashok Raj, MD⁷, Bronwyn Williams^8*, Donald Beam^9*, Jaime Morales^10*, Melissa J. Rose, DO¹¹, Kun Nie^12* and Melissa Eisen, MD^12*

¹Bleeding & Clotting Disorders Institute, Peoria, IL
²Pediatrics/OSF St. Francis - Children's Hospital of Illinois, University of Illinois College of Medicine - Peoria, Peoria, IL
³Platelet Disorders Center, Division of Pediatric Hematology-Oncology, Weill Cornell Medical College, New York, NY
⁴The Hospital for Sick Children, Toronto, ON, Canada
⁵Texas Children's Cancer and Hematology Centers, Baylor College of Medicine, Houston, TX
⁶Emory University, Atlanta, GA
⁷Pediatric Blood and Cancer Disorders Clinic, Louisville, KY
⁸The Royal Children’s Hospital, Herston, Australia
⁹Cook Childrens Medical Center, Fort Worth, TX
¹⁰Louisiana State University Health Sciences Center, New Orleans, LA
¹¹The Ohio State University College of Medicine, Nationwide Children's Hospital, Columbus, OH
¹²Amgen Inc., Thousand Oaks, CA

Lori Ann Linkins, MD, MSc, FRCPC^1*, Theodore E. Warkentin, MD², Menaka Pai, MD, MSc, FRCP(C)¹, Sudeep Shivakumar, MD³, Rizwan Manji, MD, PhD, MBA^4*, Philip S Wells, MD, FRCPC, MSc⁵, Cynthia M Wu, MD, FRCPC⁶, Ishac Nazi, Ph.D^7* and Mark A. Crowther, MD, MSc, FRCPC⁸

¹Department of Medicine, McMaster University, Hamilton, ON, Canada
²McMaster University, Hamilton, ON, Canada
³Department of Hematology, Queen Elizabeth II Health Sciences Centre, Halifax, NS, Canada
⁴Department of Surgery and Cardiac Sciences Program, University of Manitoba, Winnipeg, Canada
⁵Ottawa Hospital, Ottawa, ON, Canada
⁶Division of Hematology, University of Alberta, Edmonton, AB, Canada
⁷Department of Medicine, McMaster University. Michael G. DeGroote School of Medicine, Hamilton, ON, Canada
⁸St. Joseph's Hospital, McMaster University, Hamilton, ON, Canada

DiMaria C Erica, MD^1*, Alex Trussler, MD^1*, Dyba Janique, MD^1*, David Lee, MD, FRCPC², Michael J. Rauh, MD, PhD³, Paula D. James, MD¹, Wilma Hopman, MA^4* and Annette E Hay, MB ChB¹

¹Department of Internal Medicine, Queen's University, Kingston, ON, Canada
²Department of Internal Medicine, Queens University, Kingston, ON, Canada
³Department of Pathology & Molecular Medicine, Queen's University, Kingston, ON, Canada
⁴Department of Clinical Research, Queen's University, Kingston, Canada

Boting Wu^1*, Yanxia Zhan^1*, Feng Li^1*, Luya Cheng^1*, Shanhua Zou^1* and Yunfeng Cheng, MD, PhD²

¹Zhongshan Hospital, Fudan University, Shanghai, China
²Department of Hematology, Zhongshan Hospital, Fudan University, Shanghai, China

Ang Li, M.D.^1*, Robert S Makar, MD, PhD², Shelley Hurwitz, Ph.D.^3*, Lynne Uhl, MD⁴, Richard M. Kaufman, MD⁵, Christopher P. Stowell, MD, PhD^6*, Walter Dzik, MD⁷ and Pavan Bendapudi, M.D.⁸

¹Department of Medicine, Massachusetts General Hospital, Boston, MA
²Blood Transfusion Service, Department of Pathology, Massachusetts General Hospital, Boston, MA
³Center for Clinical Investigation, Brigham and Women's Hospital, Boston, MA
⁴Blood Transfusion Service, Beth Israel Deaconess Medical Center, Boston, MA
⁵Department of Pathology, Brigham and Women’s Hospital, Boston, MA
⁶Blood Transfusion Service, Massachusetts General Hospital, Boston, MA
⁷Blood Transfuson Service, Massachusetts General Hospital, Boston, MA
⁸Division of Hematology, Massachusetts General Hospital, Boston, MA

Leona E Ling, PhD^*, Sucharita Roy, PhD^*, Thomas Daly^*, Edward Cochran^*, Steven Tyler^*, Lynn Markowitz^*, Dorota Bulik, PhD^*, Amit Choudhury, PhD^*, James Meador^*, Viraj Parge^*, Divya Mekala, PhD^*, Sandra Sipsey^*, Srishti Gurnani^*, Jay Duffner^*, Stan Lee^*, Nathaniel Washburn^*, Robin Meccariello^*, John Schaeck^*, Jing Wang, PhD^*, Birgit Schultes, PhD^*, Jan L. Hillson, MD^*, William Avery, MS, MBA^*, Ganesh V. Kaundinya, PhD^* and Anthony M. Manning, PhD^*

Momenta Pharmaceuticals, Cambridge, MA

Guillaume Moulis, MD^1*, Thibault Comont^2*, Johanne Germain, PhD^3*, Natacha Brun, MD^4*, 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* and Daniel Adoue, MD, PhD^22*

¹Internal Medicine Department, Toulouse University Hospital; UMR 1027 Inserm-, Toulouse, France
²Department of Internal Medicine, Toulouse University Hospital, Toulouse, France
³UMR 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

Karen Lee Bride, MD, PhD¹, Derick Lim^2*, Michele Paessler, DO^3* and Michele P Lambert, MD^4,5

¹CHOP, Philadelphia, PA
²The Children's Hospital of Philadelphia, Philadelphia, PA
³Department of Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
⁴Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, PA
⁵Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA

Bertrand Godeau, MD, PhD^1*, Marc Michel, MD, PhD^2*, Lamiae Grimaldi-Bensouda, PharmD, PhD^3*, Lucien Abenhaim, MD, PhD^4*, Clementine Nordon, MD, PhD^3* and Corinne Haioun, MD, PhD⁵

¹Internal Medicine, French referral center for adult's immune cytopenia, Henri Mondor Hospital, AP-HP, UPEC University, Créteil, France
²Centre de références national pour les cytopénies auto-immunes de l'adulte, APHP, Paris, France
³Research, LASER, Paris, France
⁴Group, LASER, London, England
⁵Lymphoid Malignancies Unit, CHU Henri Mondor, Créteil, France

Juliana Perez Botero, MD¹, Laynalee K Cardel, MT^2*, Aneel A. Ashrani, MBBS, MSc^1,2, John A. Heit, MD^2,3, Rong He, MD², C Christopher Hook, MD^1,2, Robert D McBane II, MD^2,3*, Animesh Pardanani, MBBS, PhD^2,4, Deepti M. Warad, M.B.B.S.^2,5, Waldemar E Wysokinski, MD, PhD^2,3*, Vilmarie Rodriguez, MD⁵, William L. Nichols Jr., M.D.^2,4, Rajiv K. Pruthi, MBBS^1,2, Dong Chen, MD, PhD² and Mrinal M Patnaik, MBBS^1,2

¹Division of Hematology, Mayo Clinic, Rochester, MN
²Division of Hematopathology, Special Coagulation Laboratory, Mayo Clinic, Rochester, MN
³Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, MN
⁴Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN
⁵Division of Pediatric Hematology and Oncology, Mayo Clinic, Rochester, MN

Julie B Waisbren, MD^1*, Shira N. Dinner, MD², Irene Helenowski, PhD^3*, Juehua Gao, MD PhD^4*, Brandon McMahon, MD² and Brady Stein, MD²

¹Dept. of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
²Dept. of Medicine, Division of Hematology/Oncology and Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL
³Dept. of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
⁴Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL

Jenna Lakhani, BSc Hons (Medicine)^1*, Robert J. Klaassen, MD, FRCP², Nicholas J Barrowman, PhD^3*, Jason Chan, BSc (Health Science)^3* and John D. Grainger, MD, BMBch, MRCP, FRCPATH⁴

¹University of Manchester, Manchester, United Kingdom
²Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
³Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
⁴Royal Manchester Children's Hospital, Manchester, United Kingdom

Christine M. McMahon, MD¹ and Adam Cuker, MD, MS^1,2

¹Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
²Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA

Zeping Zhou Sr., M.D/Ph.D^1,2*, Zhuoqing Qiao, M.D^2,3*, Huiyuan Li, Ph.D^2*, Xian Zhang, Ph.D^2*, Feng Xue, M.D/Ph.D^2* and Renchi Yang, M.D/Ph.D²

¹Department of Hematology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
²State Key Laboratory of Experimental Hematology, Institute of Hematology and Hospital of Blood Disease, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
³Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing, China

Philip Young-Ill Choi, MBBS FRCPA FRACP

St George Clinical School, University of New South Wales, Kogarah, Australia

Nabin Khanal, MBBS¹, R. Gregory Bociek, MD², Baojiang Chen, PhD^3*, Julie M. Vose, M.D.⁴, James O. Armitage, MD⁵, Philip J Bierman, MD⁶, Lori J. Maness, MD⁷, Matthew A. Lunning, DO², Krishna Gundabolu, MD⁷ and Vijaya R. Bhatt, MD⁷

¹Department of Internal Medicine, Creighton University Medical Center, Omaha, NE
²University of Nebraska Medical Center, Omaha, NE
³Department of Biostatistics, University of Nebraska Medical Center, Omaha, NE
⁴Internal Medicine Section of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE
⁵Department of Internal Medicine, Division of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE
⁶Univ. of Nebraska Medical Center, Omaha, NE
⁷Hematology-Oncology, University of Nebraska Medical Center/Nebraska Medicine, Omaha, NE

Caroline Morbieu^1,2*, Francesco Brunetti, MD^2,3*, Laurence Baranès, MD^2,4*, Laetitia Languille^1,2*, Nicolas Limal, MD^1,2*, Valentine Loustau, MD^1,2*, Philippe Bierling, MD, PhD^1,2*, Marc Michel, MD,^2,5*, Bertrand Godeau, MD, PhD^2,5* and Matthieu Mahévas, MD, PhD^1,2*

¹Centre national de référence des cytopénies auto-immunes de l'adulte, Hôpital Henri-Mondor, APHP, Créteil, France
²Université Paris Est, Créteil, France
³Service de chirurgie viscérale, Hôpital Henri-Mondor, APHP, Créteil, France
⁴Service de Radiologie, Hôpital Henri-Mondor, APHP, Créteil, France
⁵Internal Medicine, French referral center for adult's immune cytopenia, Henri Mondor Hospital, AP-HP, UPEC University, Créteil, France

Lilach Bonstein, PhD^1,2*, Roy Lauterbach, MD^2* and Nuhad Haddad, MD^3*

¹Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel
²Blood Bank and Platelet Immunology Laboratories, Rambam Health Care Campus, Haifa, Israel
³Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel