Hyperglycaemia induces metabolic dysfunction and glycogen accumulation in pancreatic β-cells per Brereton, M, Rohm, M, Shimomura, K, Holland, C, Tornovsky-Babeay, S, Dadon, D, Iberl, M, Chibalina, M, Lee, S, Glaser, B, Dor, Y, Rorsman, P, Clark, A, Ashcroft, F