Susanne Holzhauer, MD, MSc^1*, Christoph Male, MD^2*, Paul Monagle, MBBS, MSc^3*, Mohammadreza Bordbar, MD.^4*, Heleen van Ommen, MD, PhD⁵ and Leslie J. Raffini, MD⁶

¹Department of Pediatric Hematology and Oncology, Charité University Medicine, Berlin, Germany
²Department of Paediatrics, Medical University of Vienna, Wien, Austria
³University of Melbourne Royal Children's Hospital, Parkville, Australia
⁴Hematology Research Center,, Shiraz University of Medical Sciences, Shiraz, Iran (Islamic Republic of)
⁵Sophia Children's Hospital ErasmusMC, Rotterdam, Netherlands
⁶Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, PA

Cecilia Becattini, MD, PhD^1*, Ugo Pace, MD^2*, Felice Pirozzi, MD^3*, Giampiero Avruscio, MD^4*, Annibale Donini, MD^5*, Fabio Rondelli, MD^6*, Adriana Visonà, MD^7*, Michela Boncompagni, MD^8*, Marco De Prizio, MD^9*, Damiano Chiari, MD^10*, Andrea Muratore, MD^11*, Francesco Guerra, MD^12*, Raffaele De Luca, MD^13*, Giuseppe Portale, MD^14*, Marco Milone, MD^15*, Marc Righini, MD^16*, Giampaolo Castagnoli, MD^17*, Roberto Persiani, MD^18*, Jacopo Martellucci, MD^19*, Stefania Frasson^20*, Francesco Dentali, MD^21*, Paolo Delrio, MD^2*, Antonio Sciuto, MD^3*, Gualberto Gussoni^22* and Giancarlo Agnelli, MD^23*

¹Internal and Cardiovascular Medicine - University of Perugia, Perugia, ITA
²"Fondazione G. Pascale" IRCSS, Colorectal Surgical Oncology, Abdominal Oncology Department, Istituto Nazionale per lo Studio e la Cura dei Tumori, Napoli, Italy
³Department of Surgery, Ospedale Santa Maria delle Grazie, Pozzuoli, Italy
⁴Department of Cardiac, Thoracic and Vascular Sciences, Unit of Angiology, University Hospital of Padua, Padua, Italy
⁵Department of Oncology Surgery, University of Perugia, Perugia, Italy
⁶Department of General Surgery, S. Giovanni Battista Hospital, Foligno, Perugia, Italy
⁷7. Department of Vascular Medicine, Angiology Unit- S.Giacomo Apostolo Hospital, Catelfranco Veneto, Treviso, Italy
⁸Department of General Surgery, S. Maria della Misericordia Hospital, Perugia, Italy
⁹Department of General Surgery, S. Donato Hospital, Arezzo, Italy
¹⁰Department of General Surgery, Istituto Clinico Humanitas Mater Domini, Castellanza, Varese, Italy
¹¹Department of General Surgery, Ospedale E. Agnelli, Pinerolo, Italy
¹²Department of Gneral Surgery, P.O. San Salvatore, Pesaro, Italy
¹³Department of Surgical Oncology IRCCS Istituto Tumori " Giovanni Paolo II, Bari, Italy
¹⁴Department of General Surgery, Ospedale di Cittadella, Cittadella, Italy
¹⁵Department of General and Emergency Surgery, Azienda Ospedaliera Universitaria "Federico II", Napoli, Italy
¹⁶Division of Angiology and Hemostasis, Geneva University Hospital, Geneva, Geneva, Switzerland
¹⁷Department of General Surgey, Ospedale San Matteo degli Infermi, Spoleto, Italy
¹⁸Dipartimento di Scienze mediche e chirurgiche Fondazione Policlinico Universitario A. Gemelli, IRCCS Università Cattolica del Sacro Cuore, Roma, Italy
¹⁹Department of General surgery, AOU Careggi di Firenze, Firenze, Italy
²⁰Research Department, FADOI Foundation, Milano, Italy
²¹Dipartimento Emergenza e Alta Specialità e Medical Center, ASST Sette-Laghi, Varese, Italy
²²FADOI Foundation, Milano, Italy
²³Internal and Cardiovascular Medicine - University of Perugia, Perugia, Italy

Wei Zhao, MD, PhD^1*, Pin Li, PhD^2*, Scott Kaatz, DO, MSc^3*, Katie Latack, MS^4*, Lonni Schultz, PhD^4* and Laila Poisson, PhD^2*

¹Department of Internal Medicine, Ascension St. John Hospital, Detroit, MI
²Department of Public Health Sciences, Henry Ford Health System, Detroit, MI
³Division of Hospital Medicine, Henry Ford Hospital, Detroit, MI
⁴Public Health Sciences, Henry Ford Health System, Detroit, MI

Chantal Visser^1*, Joseph S. Biedermann, PhD^2*, Melchior C. Nierman, MD^3*, Felix J. M. Van der Meer, MD, PhD^4*, Anouk J. W. Gulpen, MD, PhD^5*, Yvonne C. F. Moors^6*, Suzanne C. Cannegieter, MD, PhD^7,8*, Willem M Lijfering, PhD, MD^9*, Marieke J.H.A. Kruip, MD, PhD^1,10* and The Dutch COVID & Thrombosis Coalition^11*

¹Department of Hematology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands
²Hematology, Erasmus University Medical Center Rotterdam, Rotterdam, Netherlands
³Thrombosis and Anticoagulation, Atalmedial Medical Diagnostics Centers, Amsterdam, Netherlands
⁴Department of Internal Medicine, Leiden University Medical Centre Leiden, Leiden, Netherlands
⁵Internal Medicine, Elkerliek Hospital, Helmond, Netherlands
⁶Elkerliek Hospital Helmond, Helmond, Netherlands
⁷Department of internal medicine, section of thrombosis and hemostasis, Leiden University Medical Centre Leiden, Leiden, Netherlands
⁸Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, Netherlands
⁹Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, NLD
¹⁰Thrombosis Service Star-shl Rotterdam, Rotterdam, Netherlands
¹¹Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands

Guy Olson^1*, Walter Jeske, PhD^2*, Omer Iqbal, MD^3*, Ambar Farooqui^3*, Fakiha Siddiqui, BS⁴, Debra Hoppensteadt, PhD^3*, Ahmed Kouta^5*, Jawed Fareed, PhD⁶ and Eduardo Ramacciotti, PhD, MD^3*

¹Loyola University Medical Center, MAYWOOD, IL
²Thoracic and Cardiovascular Surgery, Loyola University Medical Center, Maywood, IL
³Pathology, Loyola University Medical Center, Maywood, IL
⁴Pathology, Maywood, IL
⁵Pharmacology, Loyola University Medical Center, Maywood, IL
⁶Pathology, Loyola University Medical Center, Bldg. 115 Room 432, IL

Silvy Laporte, PhD^1*, Andrea Marshall, PhD^2*, Annie Young, PhD^2*, Hanno Riess^3*, Marianne Sinn, MD^4*, Philippe Girard, MD^5* and Olivier Sanchez^6*

¹Clinical Pharmacology Unit, University Hospital of Saint-Etienne, INSERM U-1059 and F-CRIN INNOVTE network, France, Saint- Etienne, France
²Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom
³Hematology, Oncology, and Tumorimmunology, Charité Universitätsmedizin Berlin, Berlin, Germany
⁴Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
⁵Département de Pneumologie, Institut du thorax Curie-Montsouris, Paris and F-CRIN INNOVTE network, France, Paris, FRA
⁶Service de pneumologie, Hôpital Européen Georges Pompidou, Paris and F-CRIN INNOVTE network, France, Paris, France

Krishna Gundabolu, MBBS¹, Vijaya R. Bhatt, MD¹, Lynette M. Smith, PhD^2*, Valerie K Shostrom, MS^3*, Lori J. Maness, MD¹, Zaid S. Al-Kadhimi, MD^1*, Julie M. Vose, MD, MBA¹, R. Gregory Bociek, MD¹, Matthew A. Lunning, DO, FACP¹, Avyakta Kallam, MD¹, Christopher D'Angelo, MD^1*, Muhamed Baljevic, MD¹ and Apar K Ganti, MD; MS^1*

¹Division of Hematology & Oncology, Department of Internal Medicine, University of Nebraska Medical Center- Fred and Pamela Buffett Cancer Center, Omaha, NE
²Department of Biostatistics, University fo Nebraska Medical Center, Omaha, NE
³Department of Biostatistics, University of Nebraska Medical Center, Omaha, NE

Shafia Rahman, MD^1*, Juan Trias, MD^2*, Margarita Kushnir, MD³ and Henny H. Billett, MD, MSc⁴

¹Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY
²Montefiore Medical Center, Bronx, NY
³Hematology/Oncology, Montefiore Medical Center/Albert Einstein College of Medicine, Bronx, NY
⁴Division of Hematology, Department of Internal Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY