title: Factors influencing variability in clinical trials and in individuals' responses to treatment.
authors.forename: Richard I
authors.initials: RI
authors.lastname: Shader
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D016896:Treatment Outcome; D014807:Vitamin D / Q000008:administration & dosage
chemical_list: D014807:Vitamin D