TewariN., RollinsK., GandhiN., KayeP., and LoboD. “Mixed Periampullary Adenocarcinoma and Somatostatinoma With Small Bowel Gastrointestinal Stromal Tumour in Neurofibromatosis Type 1”. JOP. Journal of the Pancreas, Vol. 15, no. 6, Nov. 2014, pp. 600-3, doi:10.6092/1590-8577/2844.