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Ong, M.L. (1993) Endocarditis of the tricuspid valve associated with congenital coronary arteriovenous fistula. British Heart Journal, 70 (3). 276-7; discussion 277. ISSN 0007-0769, DOI 8398501.
Ong, M.L. and Glew, S. (1989) Paraquat poisoning: per vagina. Postgraduate medical journal, 65 (769). pp. 835-6. ISSN 0032-5473, DOI 2616419.