PT - JOURNAL ARTICLE ED - , TI - Introduction DP - 1971 Nov 01 TA - The Journal of the Royal College of General Practitioners PG - 1--2 VI - 21 IP - 92 Suppl 4 4099 - http://bjgp.org/content/21/92_Suppl_4/1.2.short 4100 - http://bjgp.org/content/21/92_Suppl_4/1.2.full SO - J R Coll Gen Pract1971 Nov 01; 21