Comment on Ramai et al. Risk of Hepatocellular Carcinoma in Patients with Porphyria: A Systematic Review. Cancers 2022, 14 , 2947. - Lissing, Mattias; Vassiliou, Daphne; Harper, Pauline; Sardh, Eliane; Wahlin, Staffan (Cancers, 2023)