Teo, K L, Johnson, M H, Drewes, A M & Windsor, J A 2017, ' A comprehensive pain assessment tool (COMPAT) for chronic pancreatitis : Development, face validation and pilot evaluation ', Pancreatology, vol. 17, no. 5, pp. 706-719 . https://doi.org/10.1016/j.pan.2017.07.004