PT - JOURNAL ARTICLE AU - Douglas Black TI - Churchill AID - 10.7861/clinmedicine.2-1-78 DP - 2002 Jan 01 TA - Clinical Medicine PG - 78--78 VI - 2 IP - 1 4099 - http://www.rcpjournals.org/content/2/1/78.1.short 4100 - http://www.rcpjournals.org/content/2/1/78.1.full SO - Clin Med2002 Jan 01; 2