PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd TI - Letter To The Editor AID - 10.1136/jrnms-75-124 DP - 1989 Jun 01 TA - Journal of The Royal Naval Medical Service PG - 124--124 VI - 75 IP - 2 4099 - http://jrnms.bmj.com/content/75/2/124.short 4100 - http://jrnms.bmj.com/content/75/2/124.full SO - J. Roy. Nav. Med. Serv.1989 Jun 01; 75