Funding for this research was provided by:
Received: 6 November 2019
Accepted: 19 February 2021
First Online: 8 April 2021
Change Date: 24 April 2021
Change Type: Correction
Change Details: In the original publication, Supplementary Table S1 and Additional File 4 have been published with tracked changes and comments. The article has been updated.
Ethics approval and consent to participate
: This study was reviewed by the New England Independent Review Board (NEIRB). All patients read and signed an informed consent form in addition to providing verbal consent to participate and be audio recorded during interviews.
: Not applicable.
: AVJ is an employee of GSK and holds shares in the company. RRB, NB and MK are employees of Optum, which received funding from GSK to conduct this study. JP was an employee of GSK at the time of the study and holds shares in the company.