00378nas a2200157   4500000000100000000000100001008004100002100001600043700001200059700001400071700001400085245007100099300001100170490000700181022003200188       2005                            d1 aC. Sullivan1 aR. Omar1 aG. Ambler1 aA. Majeed00aCase-mix and variation in specialist referrals in general practice  a529-330 v55  a0960-1643 (Print) 0960-1643