Crippa, Stefano, et al. “Intraductal Papillary Mucinous Neoplasms of the Pancreas With Concurrent Pancreatic and Periampullary Neoplasms”. JOP. Journal of the Pancreas, vol. 14, no. 5S, Sept. 2013, p. 537, doi:10.6092/1590-8577/1741.