RT Journal Article SR Electronic T1 Fragments JF Journal of the Royal Army Medical Corps JO J R Army Med Corps FD British Medical Journal Publishing Group SP 427 OP 439 DO 10.1136/jramc-38-06-02 VO 38 IS 6 A1 Robert Firth YR 1922 UL http://militaryhealth.bmj.com/content/38/6/427.abstract AB