1. University of Applied Sciences and Arts Western Switzerland; 5, Chemin de l'Agasse CH -1950 Sion Switzerland
2. Department of Nursing Sciences, Valais Hospital, 86; Avenue de Grand-Champsec CH -1951 Sion Switzerland
3. Valais Hospital, Directorate General; 86, Avenue de Grand-Champsec CH -1951 Sion Switzerland
4. Institut Universitaire de Formation et Recherche en Soins (IUFRS), Faculty of Biology and Medicine, University of Lausanne and Lausanne University Hospital; 10, Route de la Corniche CH -1010 Lausanne Switzerland
5. Faculty of Nursing Sciences; Université Laval; Québec Canada