Authors
Klaus Wingenfeld
klaus.wingenfeld@uni-bielefeld.de
Institute of Nursing Science at the University of Bielefeld (IPW)
Doris Schaeffer
doris.schaeffer@uni-bielefeld.de
Institute of Nursing Science at the University of Bielefeld

klaus.wingenfeld@uni-bielefeld.de
doris.schaeffer@uni-bielefeld.de
© 2011 Andreas Buescher, Klaus Wingenfeld, Doris Schaeffer, published by Igitur publishing
This work is licensed under the Creative Commons Attribution 4.0 License.