Intra-islet glucagon signalling regulates beta-cell connectivity, first-phase insulin secretion and glucose homoeostasis oleh K. Suba, Y. Patel, A. Martin-Alonso, B. Hansen, X. Xu, A. Roberts, M. Norton, P. Chung, J. Shrewsbury, R. Kwok, V. Kalogianni, S. Chen, X. Liu, K. Kalyviotis, G.A. Rutter, B. Jones, J. Minnion, B.M. Owen, P. Pantazis, W. Distaso, D.J. Drucker, T.M. Tan, S.R. Bloom, K.G. Murphy, V. Salem