[1] Home Care Akad, D-88085 Langenargen, Germany
[2] Humboldt Univ, Dept Nursing Sci, D-1086 Berlin, Germany
[3] Univ Maastricht, CAPHRI, Maastricht, Netherlands
[4] Univ Maastricht, Fac Hlth Sci & Sci, Maastricht, Netherlands
[5] Univ Groningen, Univ Med Ctr Groningen, Subdiv Care Sci, Dept Hlth Sci, Groningen, Netherlands
[6] Univ Maastricht, Fac Hlth Sci, Hlth Care Studies Sect Nursing Sci, Maastricht, Netherlands