PT - JOURNAL ARTICLE AU - George Irwin TI - Clinical and Population Medicine DP - 1983 Mar 01 TA - The Journal of the Royal College of General Practitioners PG - 185--187 VI - 33 IP - 248 4099 - http://bjgp.org/content/33/248/185.3.short 4100 - http://bjgp.org/content/33/248/185.3.full SO - J R Coll Gen Pract1983 Mar 01; 33