van der Deijl, Marielle Participation levels of physical activity programs for community-dwelling older adults: a systematic review. [electronic resource] - BMC public health Dec 2014 - 1301 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Review; Systematic Review ISSN: 1471-2458 Standard No.: 10.1186/1471-2458-14-1301 doi Subjects--Topical Terms: AgedAged, 80 and overCommunity ParticipationExerciseHumansMiddle AgedMotor Activity