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Human cytomegalovirus infection.
Keen GA. Keen GA. S Afr Med J. 1985 Aug 3;68(3):159-61. S Afr Med J. 1985. PMID: 2992105 Review.
Hepatitis D virus--how prevalent?
Tucker TJ, Keen GA, Yeats J, Hardie D. Tucker TJ, et al. Among authors: keen ga. S Afr Med J. 1997 Oct;87(10):1386-7; author reply 1388. S Afr Med J. 1997. PMID: 9472256 No abstract available.
Laboratory diagnosis of rubella.
Keen GA, du T Naude W, Kipps A. Keen GA, et al. S Afr Med J. 1978 Dec 2;54(23):956. S Afr Med J. 1978. PMID: 746423 No abstract available.
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