PT - JOURNAL ARTICLE AU - Michael J World TI - Military medicine AID - 10.7861/clinmedicine.7-3-218 DP - 2007 Jun 01 TA - Clinical Medicine PG - 218--223 VI - 7 IP - 3 4099 - http://www.rcpjournals.org/content/7/3/218.short 4100 - http://www.rcpjournals.org/content/7/3/218.full SO - Clin Med2007 Jun 01; 7