No author listed. Communicable Diseases Intelligence volume 15 issue 2 - 29 January 1991 - whole issue. Commun Dis Intell (2018) [Internet]. 1991 Jan. 29 [cited 2026 Apr. 6];15:17-33. Available from: https://ojs.cdi.cdc.gov.au/index.php/cdi/article/view/2906