On page 5866, the byline and author affiliations omit an author, Juan Francisco Miquel. The byline and author affiliations should read:

Amanda Dalby,1 Diego Mezzano,2 Juan Francisco Miquel,3 José Rivera,4 Steve P. Watson,1 and Neil V. Morgan1

1Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom; 2Laboratorio de Hemostasia, Pontificia Universidad de Chile, Santiago, Chile; 3Departmento de Gastroenterología, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile; and 4Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación, Universidad de Murcia, IMIB-Arrixaca, CIBERER-U765, Grupo Español de Alteraciones Plaquetarias Congénitas (GEAPC), Murcia, Spain

On page 5868, the author contribution statement should read:

Contribution: A.D., S.P.W., and N.V.M. designed the research; D.M. and J.F.M. diagnosed the patients and provided samples and patient data; J.R. performed GP6 molecular analysis in Spanish patients; A.D. performed experiments and analyzed data; and all authors contributed to the initial drafts and revised the manuscript.