Hassan MM, Phan A, Li D, Dagohoy CG, Leary C, Yao JC. Risk factors associated with neuroendocrine tumors: A U.S.-based case-control study. Int J Cancer. 2008 Aug 15;123(4):867-73. doi: 10.1002/ijc.23529.
Mocellin S and Nitti D. Gastrointestinal carcinoid: epidemiological and survival evidence from a large population-based study (n = 25 531). Ann Oncol. 2013 Dec;24(12):3040-4. doi: 10.1093/annonc/mdt377.
National Cancer Institute Physician Data Query (PDQ). Gastrointestinal Carcinoid Tumors Treatment (PDQ®)–Health Professional Version. 2018. Accessed at
https://www.cancer.gov/types/gi-carcinoid-tumors/hp/gi-carcinoid-treatment-pdq#section/_21 on July 25, 2018.
Pandit S, Bhusal K. Carcinoid Syndrome. [Updated 2017 Oct 9]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2018 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK448096/ Accessed July 24, 2018.