Use of the General Practice Research Database (GPRD) for respiratory epidemiology: a comparison with the 4th Morbidity Survey in General Practice (MSGP4)

Hansell, A., Hollowell, J., McNiece, R., Nicholls, T. and Strachan, D. (1999) Use of the General Practice Research Database (GPRD) for respiratory epidemiology: a comparison with the 4th Morbidity Survey in General Practice (MSGP4). Thorax - An International Journal of Respiratory Medicine, 54(5), pp. 413-419. ISSN (print) 0040-6376

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