1. Department of Geriatric Psychiatry University Hospital of Psychiatry Zurich Zurich Switzerland
2. University of Lausanne Lausanne Switzerland
3. Department of Psychiatry, Psychotherapy and Psychosomatics University of Zurich Zurich Switzerland
4. Nestlé Institute of Food Safety and Analytical Sciences Nestlé Research Lausanne Switzerland
5. Nestlé Institute of Health Sciences Nestlé Research Lausanne Switzerland
6. Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne Lausanne Switzerland
7. Old Age Psychiatry, Department of Psychiatry Lausanne University Hospital Lausanne Switzerland