Doward, Lynda
Svedsater, Henrik
Whalley, Diane
Crawford, Rebecca
Leather, David
Lay-Flurrie, James
Bosanquet, Nick
Article History
Received: 30 June 2017
Revised: 10 November 2017
Accepted: 20 November 2017
First Online: 15 December 2017
Competing interests
: L.D., D.W. and R.C. are employees of RTI Health Solutions, which has received funding from GSK. H.S., D.L. and J.L.-F. are GSK employees and hold GSK shares. N.B. was a chief investigator for the SLS follow-up interviews and received a fee from GSK.