Risk of myocarditis and pericarditis after the COVID-19 mRNA vaccination in the USA: a cohort study in claims databases.

"Declaration of interests All Optum Epidemiology coauthors are employees of Optum. KLA and JDS own stock in UnitedHealth Group. All other authors declare no competing interests."

"AcknowledgmentsThis study was funded by the US Food and Drug Administration. We thank Kristin A Sepúlveda and Tainya C Clarke of the US Food and Drug Administration; Kathryn Matuska, Xi Li, Henry Amir, Purva Shah, Mengjia Xu, Bradley Lufkin, Yuqin Wei, and Ellen Tworkoski of Acumen; Smita Bhatia, Anne Marie Kline, Nancy Sheffield, and Charlalynn Harris of CVS Health; C Robin Clifford, Michael Kirksey, Jennifer Song, Lisa Weatherby, and Vivian Wilt of Optum; Michael Goodman, Jim Frankfort, Michael Bruhn, and Ruth Weed of IQVIA; and Shiva Vojjala, Ramya Avula, Shiva Chaudhary, Shanthi P Sagare, Ramin Riahi, Navyatha Namburu, and Grace Stockbower of HealthCore, for their assistance with data validation, analysis, and project coordination. We acknowledge Blue Health Intelligence for their assistance in data acquisition."