No author listed. Communicable Diseases Intelligence volume 13 issue 25 - 18 December 1989 - whole issue. Commun Dis Intell (2018) [Internet]. 1989 Dec. 18 [cited 2026 Apr. 17];13:1-23. Available from: https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/2987