text: Common risk factors in the development of<unk><unk>  include age (50 years or older), female gender, family history of multiple endocrine neoplasia type 1 and neurofibromatosis type 1, atrophic gastritis, pernicious anemia, and Zollinger-Ellison<unk> .
option_0: Carcinoid syndrome risk factors
option_1: Peptic ulcer risk factors
option_2: Skin cancer risk factors
option_3: Gastrointestinal varices risk factors
option_4: Stomatitis risk factors
option_5: Deep vein thrombosis risk factors
option_6: Angiodysplasia risk factors
option_7: Vulvar cancer risk factors