[1] Univ Hosp Munster, Dept Neurol, Albert Schweitzer Campus 1, D-48149 Munster, Germany
[2] Metropolitan Univ Coll, Inst Nutr & Midwifery, Copenhagen, Denmark
[3] Univ Autonoma Barcelona, Hosp Mataro, Ctr Invest Biomed Red Enfermedades Hepat & Digest, Mataro, Spain
[4] Univ Manchester, Salford Royal Hosp, Fac Biol Med & Hlth, Gastrointestinal Sci,Sch Med Sci,MAHSC, Clin Sci Bldg,Eccles Old Rd, Salford M6 8HD, Lancs, England
[5] Univ Witten Herdecke, Chair Geriatr, Helios Klinikum Schwelm, Dept Geriatr, Schwelm, Germany
[6] Boston Univ, Speech Language Hearing Sci & Otolaryngol, Boston, MA USA
[7] Boston Univ, Sch Med, Boston, MA 02118 USA
[8] Alexianer Krefeld GmbH, Dept Geriatr, Diessemer Bruch 81, D-47805 Krefeld, Germany
[9] Univ Toronto, Dept Speech Language Pathol, 160-500 Univ Ave, Toronto, ON, Canada
[10] Univ Klinikum Giessen & Marburg Standort Marburg, Abt Phoniatrie & Padaudiol, Baldingerstr 1, D-35043 Marburg, Germany
[11] Katholisches Marienkrankenhaus GmbH, Alfredstr 9, Hamburg, Germany
[12] Med Coll Wisconsin, Div Gastroenterol & Hepatol, Milwaukee, WI 53226 USA
[13] Friedrich Alexander Univ Erlangen Nurnberg, Inst Biomed Aging, Kobergerstr 60, Nurnberg, Germany
[14] St John God Hosp Regensburg, Dept Gen Internal Med & Geriatr, Regensburg, Germany
[15] Marien Hosp Borken, Dept Internal Med & Geriatr, Borken, Germany