title: Physical activity data may be unsound.
authors.forename: D
authors.initials: D
authors.lastname: Batty
mesh_terms: D015444:Exercise; D005260:Female; D006801:Humans; D010809:Physical Fitness; D015203:Reproducibility of Results; D012107:Research Design; D012907:Smoking; D011795:Surveys and Questionnaires; D013548:Sweden