title: Thumbs up and down.
authors: Erin
authors: E
authors: Walkinshaw
mesh_terms: D040421:Cell Phone; D034201:Computers, Handheld; D012090:Cumulative Trauma Disorders / Q000209:etiology*; D006804:Ergonomics; D006801:Humans; D013933:Thumb / Q000293:injuries*