Clinical and nutritional status in the late postoperative of pancreaticoduodenectomy. Influence of pylorus preservation procedure - Muniz, Cinara Knychala; Braga, Camila Bity Moreno; Kemp, Rafael; Santos, José Sebastião dos; Cunha, Selma Freire de Carvalho da (Acta Cirúrgica Brasileira, 2012)