Bähler C, Bjarnason-Wehrens B, Schmid J-P, Saner H. SWISSPAQ: validation of a new physical activity questionnaire in cardiac rehabilitation patients. Swiss Med Wkly [Internet]. 2013 Feb. 24 [cited 2024 Nov. 22];143(0910):w13752. Available from: https://smw.ch/index.php/smw/article/view/1658