Development and validation of a quantitative electron microscopy score to assess acute cellular stress in the human exocrine pancreas by Kattner, N, Dyson, N, Bury, Y, Tiniakos, D, White, K, Davey, T, Eliasson, L, Tindale, L, Wagner, BE, Honkanen-Scott, M, Doyle, J, Ploeg, RJ, Shaw, JA, Scott, WE