DiSantostefano, Rachael L
Boudiaf, Nada
Stempel, David A
Barnes, Neil C
Greening, Andrew P
Article History
Received: 11 September 2015
Revised: 13 May 2016
Accepted: 17 May 2016
First Online: 21 July 2016
Competing interests
: D.A.S., N.C.B. and A.P.G. are employees of GSK; D.A.S. and N.C.B. also own shares/share options in GSK. R.L.D. was employed by GSK during the conduct of the study and by Parexel during the completion of the manuscript; R.L.D. owns shares in GSK. N.B. was employed by GSK during the conduct of the study and the completion of the manuscript; N.B. owns shares in GSK.