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\bibitem{Fix_etal1989} Fix, A. S., Riordan, D. P., Hill, H. T., Gill, M. A., \& Evans, M. B. (1989). Feline panleukopena virus and subsequent canine-distemper virus infection in two snow leopards (Panthera uncia). \textit{Journal of Zoo and Wildlife Medicine}, \textit{20}(3), 273--281.

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