title: Validity and reliability--what's it all about? Part 3: Issues relating to qualitative studies.
authors.affiliation: Glasgow Caledonian University, Yorkhill Hospital.
authors.forename: Alison
authors.initials: A
authors.lastname: Twycross
authors.forename: Linda
authors.initials: L
authors.lastname: Shields
mesh_terms: D006801:Humans; D036301:Qualitative Research; D015203:Reproducibility of Results; D012107:Research Design / Q000592:standards