PT - JOURNAL ARTICLE AU - Coemgenus TI - The principle of dual effect AID - 10.7861/clinmedicine.6-2-221 DP - 2006 Mar 01 TA - Clinical Medicine PG - 221--222 VI - 6 IP - 2 4099 - http://www.rcpjournals.org/content/6/2/221.short 4100 - http://www.rcpjournals.org/content/6/2/221.full SO - Clin Med2006 Mar 01; 6