No author listed. Communicable Diseases Intelligence volume 14 issue 23 - 19 November 1990 - whole issue. Commun Dis Intell (2018) [Internet]. 1990 Nov. 19 [cited 2026 Apr. 7];14:1-20. Available from: https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/2957