(BMJ Publishing Group, 2017) Bjornsdottir, Erla; Janson, Christer; Lindberg, Eva; Arnardottir, Erna Sif; Benediktsdóttir, Bryndís; García Aymerich, Judith; Carsin, Anne-Elie; Gómez Real, Francisco; Torén, Kjell; Heinrich, Joachim; Nowak, Dennis; Sánchez-Ramos, José Luis; Demoly, Pascal; Dorado Arenas, Sandra; Coloma Navarro, Ramon; Schlünssen, Vivi; Raherison, Chantal; Jarvis, Deborah; Gislason, Thorarinn