Cooper, Vanessa
Metcalf, Leanne
Versnel, Jenny
Upton, Jane
Walker, Samantha
Horne, Rob
Article History
Received: 18 December 2014
Accepted: 3 February 2015
First Online: 9 July 2015
Competing interests
: GlaxoSmithKline plc, MSD and Novartis Pharmaceuticals UK Ltd had no input into the study design, data collection, analysis or interpretation of the findings. RH has undertaken speaker engagements with honoraria with the following companies: Abbvie, Amgen, Biogen Idec, Gilead Sciences, GlaxoSmithKline, Janssen, Pfizer, Roche and Shire Pharmaceuticals. RH is funder and shareholder of a UCL-business spin out company (Spoonful of Sugar) providing consultancy on medication-related behaviours to healthcare policy makers, providers and industry. SW is an Associate editor of <i>npj Primary Care Respiratory Medicine</i>, but was not involved in the editorial review of, nor the decision to publish, this article. The other authors declare no conflicts of interest.