title: Bias in case-control studies of calcium antagonists.
authors: A M
authors: AM
authors: Walker
authors: E S
authors: ES
authors: Johnson
mesh_terms: D015982:Bias; D002121:Calcium Channel Blockers / Q000009:adverse effects / Q000627:therapeutic use*; D016022:Case-Control Studies; D006801:Humans
chemical_list: D002121:Calcium Channel Blockers