
Keywords: پروتوپورفیری اریتروپوشی; Cer; ceramide; EPP; erythropoietic protoporphyria; FECH; ferrochelatase; MS/MS; tandem mass spectrometry; OPLS-DA; orthogonal projection to latent structures-discriminant analysis; PC; phosphatidylcholine; PCA; principal component analysis; PPIX; protopor