title: Preface.
authors.forename: Roger A
authors.initials: RA
authors.lastname: Fielding
authors.forename: Cornel
authors.initials: C
authors.lastname: Sieber
authors.forename: Bruno
authors.initials: B
authors.lastname: Vellas
mesh_terms: D000369:Aged, 80 and over; D003131:Combined Modality Therapy; D003226:Congresses as Topic; D006233:Persons with Disabilities / Q000534:rehabilitation; D058620:Elder Nutritional Physiological Phenomena; D005221:Fatigue / Q000517:prevention & control / Q000628:therapy; D016330:Frail Elderly; D006299:Health Services for the Aged / Q000639:trends; D006801:Humans; D055948:Sarcopenia / Q000517:prevention & control / Q000628:therapy; D013851:Thinness / Q000517:prevention & control / Q000628:therapy; D057170:Translational Research, Biomedical / Q000639:trends