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2. Non-operative removal of retained biliary tract stones: combined percutaneous extraction and heparin flushing therapy;Whelan;J Ky Med Assoc,1974
3. An evaluation of solutions for fragmentation and dissolution of gallstones and their effect on liver and ductal tissue;Best;Ann Surg,1953
4. The nonoperative treatment of retained stones in the common bile duct;Galloway;Surg Gynecol Obstet,1973
5. Retained common duct stones: a new nonoperative technique for treatment;Lamis;Surgery,1969