Doğanci, Tümay, et al. “Progressive Familial Intrahepatic Cholestasis With Normal GGT Level Appearing With Lichenification and Enlargement of Hands and Feet”. The Turkish Journal of Pediatrics, vol. 47, no. 4, Oct. 2005, pp. 385-9, https://turkjpediatr.org/article/view/2752.