Keywords: EPP, erythropoietic protoporphyria; FECH, ferrochelatase; IVS3-48C; PP, protoporphyrin; erythropoietic protoporphyria; ferrochelatase; iEPP, incomplete erythropoietic protoporphyria; incomplete erythropoietic protoporphyria; photosensitivity; silent erythropoietic protoporphyria.