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Rao RA, Hegde BM, Bhat EK, Vidyavathi U, Rao RR.Rao RA, et al. Among authors: hegde bm.Postgrad Med J. 1991 Jul;67(789):652-4. doi: 10.1136/pgmj.67.789.652.Postgrad Med J. 1991.PMID: 1924051Free PMC article.