(Portland, OR)  --  Police are looking for a man with Alzheimer's who's been reported missing.  Authorities say 68-year-old Duane Hall became separated from his family yesterday at the Veteran's Administration Hospital in Southwest Portland.  Officials say Hall was last seen around 1:30 yesterday afternoon and is likely lost and disoriented.  Hall, who lives in Vancouver, is described as white, standing six feet tall and weighing 170 pounds, with gray hair and blue eyes, and last seen wearing a dark blue jacket with tan sleeves, matching pants, black shoes, and a tan baseball cap.