RT Journal Article SR Electronic T1 Abstracts JF Journal of The Royal Naval Medical Service JO J. Roy. Nav. Med. Serv. FD BMJ Publishing Group Ltd SP 43 OP 45 DO 10.1136/jrnms-70-43 VO 70 IS 1 YR 1984 UL http://jrnms.bmj.com/content/70/1/43.abstract AB