RT Journal Article SR Electronic T1 Protecting time JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 222 OP 223 DO 10.3399/bjgp10X483724 VO 60 IS 572 A1 Iona Heath YR 2010 UL http://bjgp.org/content/60/572/222.2.abstract AB