Comment on

• A prospective randomized trial of Teflon versus polyethylene stents for distal malignant biliary obstruction.

  van Berkel AM, Boland C, Redekop WK, Bergman JJ, Groen AK, Tytgat GN, Huibregtse K. van Berkel AM, et al. Endoscopy. 1998 Oct;30(8):681-6. doi: 10.1055/s-2007-1001388. Endoscopy. 1998. PMID: 9865556 Clinical Trial.
• Feasibility of stent placement above the sphincter of Oddi ("inside-stent") for patients with malignant biliary obstruction.

  Liu Q, Khay G, Cotton PB. Liu Q, et al. Endoscopy. 1998 Oct;30(8):687-90. doi: 10.1055/s-2007-1001389. Endoscopy. 1998. PMID: 9865557
• Biliary stenting with a prototype expandable Teflon endoprosthesis.

  Haringsma J, Huibregtse K. Haringsma J, et al. Endoscopy. 1998 Oct;30(8):718-20. doi: 10.1055/s-2007-1001395. Endoscopy. 1998. PMID: 9865563 Clinical Trial.