Follow-up will consist of clinical examination 1 month after treatment and every 6 months thereafter. Data collected will include pain relapses, ESWL, endoscopic and surgical procedures, weight change, plus any other seemingly unrelated medical treatments. In addition to this, a S-MRCP will be performed 1 month after treatment. Triolein breath test will be performed at 1 month and 1 year. Sampling of stools (for elastase measurement) will be obtained every year.