Gray C H, Lim C K, Nicholson D C
Clin Chim Acta. 1977 Jun 1;77(2):167-78. doi: 10.1016/0009-8981(77)90024-9.
The analysis of faecal and urinary porphyrins by high pressure liquid chromatography (H.P.L.C.) provides characteristic profiles and facilitates rapid diagnosis of variegate (porphyria cutanea tarda hereditaria), symptomatic porphyria (porphyria cutanea tarda symptomatica), hereditary coproporphyria, acute intermittent porphyria, erythro-hepatic protoporphyria and congenital porphyria (erythropoietic porphyria).