PT - JOURNAL ARTICLE AU - James Brennig TI - NEGATIVE EVIDENCE IN MEDICAL PRACTICE DP - 1979 Dec 01 TA - The Journal of the Royal College of General Practitioners PG - 753--754 VI - 29 IP - 209 4099 - http://bjgp.org/content/29/209/753.4.short 4100 - http://bjgp.org/content/29/209/753.4.full SO - J R Coll Gen Pract1979 Dec 01; 29