[1] Hosp Bierzo, Unidad Valorac Geriatr, Leon 24411, Spain
[2] Hosp Carmen & Severo Ochoa, Serv Anal Clin, Cangas De Narcea, Asturias, Spain
[3] Ctr Salud Ponferrada II, Serv Atenc Primaria, Leon, Spain
[4] Complejo Univ Vigo, Secc Geriatria, Hosp Meixoeiro, Vigo, Spain
[5] Univ N Texas, Hlth Sci Ctr, Dept Social & Behav Sci, Sch Publ Hlth, Ft Worth, TX USA