[1] Univ Ioannina, Sch Med, Dept Psychiat, GR-45110 Ioannina, Greece
[2] Univ Ioannina, Sch Med, Dept Internal Med, Rheumatol Clin, GR-45110 Ioannina, Greece
[3] NE London Fdn Trust, Dept Old Age Psychiat, London, England
[4] Univ Fed Ceara, Fac Med, Dept Clin Med, Fortaleza, Ceara, Brazil