ChristianeMuth, LorenzUhlmann, Walter EHaefeli, JustineRochon, Marjanvan den Akker, RafaelPerera, CorinaGüthlin, MartinBeyer, FrankOswald, Jose MariaValderas, J AndréKnottnerus, Ferdinand MGerlach, SebastianHarder
BMJ Open Feb 2018, 8 (2) e017740; DOI: 10.1136/bmjopen-2017-017740