title: Clinical research: a primer of practical tips.
authors.forename: Jaime
authors.initials: J
authors.lastname: Calvo-Alén
authors.forename: Graciela S
authors.initials: GS
authors.lastname: Alarcón
mesh_terms: D035843:Biomedical Research / Q000458:organization & administration*; D017408:Guidelines as Topic; D006801:Humans; D012219:Rheumatology / Q000379:methods