1. Porphyrias: demons in disguise?;Lofton;Diagn Med,1984
2. The “insanity” of King George III: a classic case of porphyria;Mcalpine;Br Med J,1966
3. The porphyrias;Meyer,1978
4. Braunwald E, ed. Harrison’s Principles of Internal Medicine. New York: McGraw-Hill; 2001:2267
5. Disorders of porphyrins or metals;Bissell,1988