Analysis of loss of heterozygosity on chromosome 11 and infrequent inactivation of the MEN1 gene in sporadic pituitary adenomas. - Tanaka,C.; Kimura,T.; Yang,P.; Moritani,M.; Yamaoka,T.; Yamada,S.; Sano,T.; Yoshimoto,K.; Itakura,M. (J Clin Endocrinol Metab, 1998)