The online version of the original article can be found at http://dx.doi.org/10.1007/s00125-011-2150-4.
Atlantic DIP collaborators (Ireland): L. Carmody, Galway University Hospital, Galway; M. Durkan, M. Brassil, Y. Mitchell, Portiuncla Hospital, Ballinasloe, Co. Galway; M.S. Mohamed, M. Todd, Mayo General Hospital, Castlebar, Co. Mayo; C. McHugh, H. Langan, M. Keenan, Sligo General Hospital, Co. Sligo; M. Nandini, T. Gallagher, Letterkenny General Hospital, Co. Donegal.