Loerbroks, Adrian
Sheikh, Aziz
Leucht, Verena
Apfelbacher, Christian J
Icks, Andrea
Angerer, Peter
Article History
Received: 30 December 2015
Revised: 2 June 2016
Accepted: 5 June 2016
First Online: 11 August 2016
Competing interests
: AS is Joint Editor-in-Chief 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 conflict of interest.