Figure 4 Kaplan–Meier cumulative‐event curves for persistent pain relief in the 42 patients included in this trial within 2 years from the onset of chronic pancreatitis, as compared with the cohort of patients that served as a reference for the natural history of pain in chronic pancreatitis (individual data kindly provided by RW Ammann).¹⁶ Persistent pain relief was defined as the absence of pain recurrence for ⩾2 years.