title: Registration of observational studies.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Loder
authors.forename: Trish
authors.initials: T
authors.lastname: Groves
authors.forename: Domhnall
authors.initials: D
authors.lastname: Macauley
mesh_terms: D015982:Bias; D035843:Biomedical Research / Q000941:ethics / Q000458:organization & administration*; D004812:Epidemiologic Methods