The comorbidity burden of type 2 diabetes mellitus: patterns, clusters and predictions from a large English primary care cohort by Nowakowska, M, Zghebi, SS, Ashcroft, DM, Buchan, I, Chew-Graham, C, Holt, T, Mallen, C, Van Marwijk, H, Peek, N, Perera-Salazar, R, Reeves, D, Rutter, MK, Weng, SF, Qureshi, N, Mamas, MA, Kontopantelis, E