Meng, Wenbo, et al. “Re: Forceps-Related Endoscopic Transpapillary Biliary Biopsy Programmes, Reply: Endoscopic Biopsy Techniques for Proximal Biliary Strictures”. Turkish Journal of Gastroenterology, vol. 28, no. 3, Jan. 2017, pp. 225-6, doi:10.5152/tjg.2017.0204012.