Bergquist, J. R., Shubert, C. R., Ubl, D. S., Thiels, C. A., Kendrick, M. L., Truty, M. J., & Habermann, E. B. (2016). Risk by indication for pancreaticoduodenectomy in patients 80 years and older: A study from the American College of Surgeons National Surgical Quality Improvement Program. HPB (Oxford).

Bergquist, John R., Christopher R. Shubert, Daniel S. Ubl, Cornelius A. Thiels, Michael L. Kendrick, Mark J. Truty, e Elizabeth B. Habermann. "Risk By Indication for Pancreaticoduodenectomy in Patients 80 Years and Older: A Study From the American College of Surgeons National Surgical Quality Improvement Program." HPB (Oxford) 2016.

Bergquist, John R., et al. "Risk By Indication for Pancreaticoduodenectomy in Patients 80 Years and Older: A Study From the American College of Surgeons National Surgical Quality Improvement Program." HPB (Oxford) 2016.