title: Secondary analyses of large population-based data sets: issues of quality, standards, and understanding.
authors: Center of Surgical Outcomes and Quality, University of California, Los Angeles, Los Angeles, CA, USA. cko@mednet.ucla.edu
authors: Clifford Y
authors: CY
authors: Ko
authors: Janak
authors: J
authors: Parikh
authors: David
authors: D
authors: Zingmond
mesh_terms: D015982:Bias; D006801:Humans; D008495:Medical Oncology; D017063:Outcome Assessment, Health Care / Q000592:standards; D017712:Peer Review, Research; D011643:Publishing / Q000592:standards; D011787:Quality of Health Care; D016032:Randomized Controlled Trials as Topic; D012042:Registries; D018426:SEER Program; D013043:Specialties, Surgical / Q000592:standards