title: Questionnaire surveys in medical research.
authors.affiliation: Gastrointestinal Research Unit, Leicester General Hospital, UK.
authors.forename: A
authors.initials: A
authors.lastname: Mandal
authors.forename: J
authors.initials: J
authors.lastname: Eaden
authors.forename: M K
authors.initials: MK
authors.lastname: Mayberry
authors.forename: J F
authors.initials: JF
authors.lastname: Mayberry
mesh_terms: D015982:Bias; D019538:Health Care Surveys / Q000379:methods*; D006801:Humans; D020407:Internet; D007407:Interviews as Topic; D012107:Research Design; D011795:Surveys and Questionnaires / Q000592:standards*