Statements and Declarations
Competing Interests: None
Data availability statement: The data that support the findings of this study are available from Uppsala Monitoring Centre.
Funding statement: No fundings were received for the conduction of this project.
Ethics of approval statement: This investigation received an exemption from the University of California San Francisco institutional review board as VigiBase data was deidentified.
Patient consent statement: Not applicable
Permission to reproduce material from other sources: Not applicable
Clinical trial registration: Exempted as our study is not a clinical trial by design.
Author contributions: BNB & NMS conceptualized; AS, CS, & JLL identified online forums; AS, CS, JLL, & BA extracted data from forum posts; AS & BA performed statistical analysis; AS & BA drafted the manuscript; UG, LAH, NMS, & BNB revised the manuscript.