- Somatic mutation of the MEN1 gene in parathyroid tumours. Heppner, C., Kester, M.B., Agarwal, S.K., Debelenko, L.V., Emmert-Buck, M.R., Guru, S.C., Manickam, P., Olufemi, S.E., Skarulis, M.C., Doppman, J.L., Alexander, R.H., Kim, Y.S., Saggar, S.K., Lubensky, I.A., Zhuang, Z., Liotta, L.A., Chandrasekharappa, S.C., Collins, F.S., Spiegel, A.M., Burns, A.L., Marx, S.J. Nat. Genet. (1997)