Screening of p53 mutations by polymerase chain reaction-single strand conformation polymorphism (pcr-sscp) in primary gastric cancers - Sanches, S M; Correa, M L C; Uchoa, R A; Medeiros, A C; Sabbaga, Jorge; Brentani, Ricardo Renzo (Reun an Fed Soc Biol Exp, 1994)