title: Current concepts review. Methods for locating missing patients for the purpose of long-term clinical studies.
authors.forename: M F
authors.initials: MF
authors.lastname: Swiontkowski
mesh_terms: D005500:Follow-Up Studies; D006801:Humans; D017063:Outcome Assessment, Health Care; D011367:Professional Staff Committees; D012189:Retrospective Studies; D013997:Time Factors