title: Randomized clinical trials and observational studies are more often alike than unlike.
authors.forename: Joseph S
authors.initials: JS
authors.lastname: Ross
mesh_terms: D019386:Alendronate / Q000494:pharmacology*; D050071:Bone Density Conservation Agents / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000453:epidemiology*; D004164:Diphosphonates / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology*; D000077211:Zoledronic Acid
chemical_list: D050071:Bone Density Conservation Agents; D004164:Diphosphonates; D007093:Imidazoles; D000077211:Zoledronic Acid; D019386:Alendronate