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FREYTES HA, FERNANDEZ B, FLEMING WC.FREYTES HA, et al.South Med J. 1965 Feb;58:223-6. doi: 10.1097/00007611-196502000-00017.South Med J. 1965.PMID: 14246949No abstract available.
PANIAGUA ME, FREYTES HR.PANIAGUA ME, et al. Among authors: freytes hr.Bol Asoc Med P R. 1957 Aug;49(8):312-4.Bol Asoc Med P R. 1957.PMID: 13535945No abstract available.