title: The more you look the more you find: problems of biases inherent in non-randomized studies.
authors.forename: P
authors.initials: P
authors.lastname: Bryant
mesh_terms: D003920:Diabetes Mellitus / Q000097:blood*; D006441:Hemoglobin A / Q000378:metabolism*; D006801:Humans
chemical_list: D006441:Hemoglobin A