PT - JOURNAL ARTICLE AU - Martin Lev TI - Letters DP - 1989 Apr 01 TA - The Journal of the Royal College of General Practitioners PG - 172--172 VI - 39 IP - 321 4099 - http://bjgp.org/content/39/321/172.1.short 4100 - http://bjgp.org/content/39/321/172.1.full SO - J R Coll Gen Pract1989 Apr 01; 39