Biological properties of ret with cysteine mutations correlate with multiple endocrine neoplasia type 2A, familial medullary thyroid carcinoma, and Hirschsprung's disease phenotype. - Ito,S.; Iwashita,T.; Asai,N.; Murakami,H.; Iwata,Y.; Sobue,G.; Takahashi,M. (Cancer Res, 1997)