title: Double-blind study of four oral cholecystographic preparations.
mesh_terms: D000284:Administration, Oral; D000409:Alanine / Q000008:administration & dosage / Q000009:adverse effects; D002087:Butyrates / Q000009:adverse effects; D002765:Cholecystography; D002986:Clinical Trials as Topic; D003287:Contrast Media / Q000008:administration & dosage / Q000009:adverse effects; D004064:Digestive System / Q000187:drug effects; D005069:Evaluation Studies as Topic; D006801:Humans; D007462:Iodobenzenes / Q000008:administration & dosage / Q000009:adverse effects; D007480:Iopanoic Acid / Q000008:administration & dosage / Q000009:adverse effects
chemical_list: D002087:Butyrates; D003287:Contrast Media; D007462:Iodobenzenes; D007480:Iopanoic Acid; D000409:Alanine