Vipperla K, Kanakis A, Slivka A, Althouse AD, Brand RE, Phillips AE, Chennat J, Papachristou GI, Lee KK, Zureikat AH, Whitcomb DC, Yadav D. Natural course of pain in chronic pancreatitis is independent of disease duration. Pancreatology. 2021 Apr; 21(3):649-657.