31146document6935Smoking_CPRD_Codebook.txttext/plain5389ccc2eec44918140a3164a082ea15da06af83765db0117db4cc2c4addc6feSHA2561492019-07-22 13:45:46https://datacompass.lshtm.ac.uk/id/eprint/1258/2/Smoking_CPRD_Codebook.txt