1. Leisure Activity and Cognitive Decline in Incident Alzheimer Disease Helzner, Elizabeth P.; Scarmeas, Nikolaos; Cosentino, Stephanie; Portet, Florence; Stern, Yaakov 2007 Articles Alzheimer's diseaseLeisureMentally ill older peopleCognitionAlzheimer's disease--Patients--RecreationAlzheimer's disease--PatientsDementiaMental healthEpidemiologyAgingGerontology