RT Journal Article SR Electronic T1 Serial Numbers for Patients JF Journal of the College of General Practitioners and Research Newsletter JO J Coll Gen Pract Res Newsl FD British Journal of General Practice SP 303 OP 303 VO 2 IS 3 A1 Johnson, George YR 1959 UL http://bjgp.org/content/2/3/303.1.abstract AB