PT - JOURNAL ARTICLE AU - Nigel J Masters TI - Extracting smoking data from GP electronic health records AID - 10.3399/bjgp21X714701 DP - 2021 Feb 01 TA - British Journal of General Practice PG - 58--59 VI - 71 IP - 703 4099 - http://bjgp.org/content/71/703/58.3.short 4100 - http://bjgp.org/content/71/703/58.3.full SO - Br J Gen Pract2021 Feb 01; 71