title: Sample size and statistical power in clinical orthopaedic research.
authors.affiliation: Sports Medicine Service, University of Pennsylvania School of Medicine and Veterans' Hospital, Philadelphia 19104, USA.
authors.forename: K B
authors.initials: KB
authors.lastname: Freedman
authors.forename: J
authors.initials: J
authors.lastname: Bernstein
mesh_terms: D006801:Humans; D009985:Orthopedics; D018401:Sample Size; D013223:Statistics as Topic