Zela Campos, R. P. Incidencia, diagnóstico histopatológico Y pronóstico De Tumores Periampulares Tratados Quirúrgicamente. Hospital Sabogal - EsSalud, 2004-2012: Incidence, Histopathological Diagnosis and Prognosis of Periampullary Tumors Treated Surgically. Sabogal Hospital - EsSalud, 2004 - 2012. Rev.Fac.Med.Hum 2017, 14, 13-19.