Received: 7 July 2020
Accepted: 27 January 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: The data from the 3 observational studies analyzed herein were retrieved from the source publications [CitationRef removed–CitationRef removed]. Therefore, subject informed consent and Institutional Review Board approval are not required for studies using these data sources.
: Not applicable.
: EA, EC, LM, PN and DR are employees of the GSK group of companies, EA and DR hold shares in the GSK group of companies. EG was an employee of the GSK group of companies at the initiation of the study. SV declares no competing interests. All authors have no non-financial interest to declare.