Funding for this research was provided by:
Received: 10 November 2020
Accepted: 31 January 2022
First Online: 14 February 2022
: No ethical approval was required for this study, as it used deidentified patient data from the Optum® EHR dataset. Data was accessed from Optum® and used under license for the current study. The license allows Pfizer to access currently available data from the Optum® deidentified EHR dataset.
: Not applicable.
: AHS, MB, RC, NP and JAA are employees of, and hold shares in, Pfizer Inc. ER is a former employee of Pfizer Inc. ZY has no conflicts of interest to declare.