1. GI Physiology Unit; University College London; London UK
2. Department of Geriatric Medicine; Erasmus Medical Centre; Rotterdam The Netherlands
3. Istituto Geriatrico “Pio Albergo Trivulzio”; Milan Italy
4. Faculty of Medicine; RWTH Aachen; Aachen Germany
5. Division of Digestive Diseases; Department of Medicine; Instituo de Investigación Sanitaria San Carlos; Hospital Clínico San Carlos; Universidad Complutense de Madrid; Madrid Spain
6. PromoCon; Disabled Living; Manchester UK