Record linkage. A powerful tool for epidemiologic analysis.
D003219:Confidentiality; D004812:Epidemiologic Methods; D006801:Humans; D008498:Medical Record Linkage; D008499:Medical Records; D009381:Neoplasms, Radiation-Induced / Q000209:etiology; D012871:Skin Diseases / Q000532:radiotherapy; D012878:Skin Neoplasms / Q000209:etiology