No author listed. Communicable Diseases Intelligence volume 13 issue 23 - 20 November 1989 - whole issue. Commun Dis Intell (2018) [Internet]. 1989 Nov. 20 [cited 2026 Apr. 23];13:1-14. Available from: https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/2984