- Correspondence to Dr Ulrich Thiem, Department of Geriatrics, Marienhospital Herne, University of Bochum, Widumer Str 8, Herne D-44627, Germany;
- Received June 2, 2014
- Revised January 6, 2015
- Accepted January 8, 2015
- First published January 24, 2015.
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