Siwiec, A., and B. T. Marczak. “Porphyria - known disease - undiagnosed. 25 years old patient with glomerulonephritis and the first attack of porphyria –clinical case”. European Journal of Clinical and Experimental Medicine, vol. 7, no. 4, Dec. 2009, pp. 424–427, https://journals.ur.edu.pl/ejcem/article/view/13144.