ALAD and porphyria cutanea tarda: Hepatic porphyrias include delta-aminolevulinic acid dehydratase-deficiency porphyria (ADP; OMIM 612740), acute intermittent porphyria (AIP; OMIM 176000), hereditary coproporphyria (HCP; OMIM 121300), variegate porphyria (VP; OMIM 176200), and porphyria cutanea tarda (PCT; OMIM 176100), whereas the erythropoietic porphyria group consists of X-linked protoporphyria (XLP; OMIM 300752), congenital erythropoietic porphyria (CEP; OMIM 263700), hepatoerythropoietic porphyria (HEP; OMIM 176100), and erythropoietic protoporphyria (EPP; OMIM 177000) [3,4,5].