Norma Valverde Castañeda

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UNLABELLED The breast cancer is one of the most frequent in the world, with an incidence that has been raising despite the many different prevention programs. In the early 1980s, two groups of investigators report a new tumor marker and called it cancer antigen 15-3 (CA 15-3). CA 15-3 in the diagnostic and follow up of patients with breast cancer has a(More)
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