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Publikováno v:
BMC Medical Research Methodology
BMC Medical Research Methodology, Vol 11, Iss 1, p 38 (2011)
BMC Medical Research Methodology, Vol 11, Iss 1, p 38 (2011)
Background Health service databases of administrative type can be a useful tool for the study of progression of a disease, but the data reported in such sources could be affected by misclassifications of some patients' real disease states at the time