Patient-reported physical activity questionnaires: A systematic review of content and format

by Williams, Kate, Frei, Anja, Vetsch, Anders, Dobbels, Fabienne, Puhan, Milo A, Rüdell, Katja
Published 2012

A comprehensive systematic review of the development process of 104 patient-reported outcomes (PROs) for physical activity in chronically ill and elderly people

by Frei, Anja, Williams, Kate, Vetsch, Anders, Dobbels, Fabienne, Jacobs, Laura, Rüdell, Katja, Puhan, Milo A
Published 2011