RET and multiple endocrine neoplasia type 2B: Hofstra Hofstra RM RM Landsvater Landsvater RM RM Ceccherini Ceccherini I I A mutation in the RET proto-oncogene associated with multiple endocrine neoplasia type 2B and sporadic medullary thyroid carcinoma A mutation in the RET proto-oncogene associated with multiple endocrine neoplasia type 2B and sporadic medullary thyroid carcinoma Nature Nature 1994 1994 367 367 375 375 376 376 10.1038/367375a0 10.1038/367375a0 supplied-pmid 7906866?