RT Journal Article SR Electronic T1 London School of Hygiene and Tropical Medicine Incorporating the Ross Institute JF Journal of the Royal Army Medical Corps JO J R Army Med Corps FD British Medical Journal Publishing Group SP 183 OP 186 DO 10.1136/jramc-72-03-05 VO 72 IS 3 YR 1939 UL http://militaryhealth.bmj.com/content/72/3/183.abstract AB