title: Methods for locating missing patients for the purpose of long-term clinical studies.
authors.affiliation: Department of Orthopaedic Surgery, University of California at Los Angeles School of Medicine, USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Smith
authors.forename: H G
authors.initials: HG
authors.lastname: Watts
mesh_terms: D016208:Databases, Factual; D005500:Follow-Up Studies; D006801:Humans; D017063:Outcome Assessment, Health Care; D018579:Patient Selection; D011177:Postal Service; D012042:Registries; D014481:United States