[1] Univ Basel, Inst Nursing Sci, Bernoullistr 28, CH-4056 Basel, Switzerland
[2] Univ Appl Sci, Claudiana, Lorenz Bohler Str 13, I-39100 Bozen Bolzano, Italy
[3] Univ Hosp Inselspital Bern, Nursing & Midwifery Res Unit, CH-3010 Bern, Switzerland
[4] Univ Basel Hosp, Swiss Acad Insurance Med, Petersgraben 4, CH-4031 Basel, Switzerland
[5] Katholieke Univ Leuven, Acad Ctr Nursing & Midwifery, Leuven, Belgium