SÖKMEN, Mehmet, Hüseyin DEMİRSOY, Özdal ERSOY, Gonca GÖKDEMİR, Nihat AKBAYIR, Çetin KARACA, Kamil ÖZDİL, Beşir KESİCİ, Can ÇALIŞKAN, and Banu YILMAZ. 2007. “Paraneoplastic Porphyria Cutanea Tarda Associated With Cholangiocarcinoma: Case Report”. Turkish Journal of Gastroenterology 18 (3):201-5. https://www.turkjgastroenterol.org/index.php/tjg/article/view/1601.