RT Journal Article SR Electronic T1 Porphyria for the general physician JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 275 OP 281 DO 10.7861/clinmedicine.5-3-275 VO 5 IS 3 A1 Timothy J Peters A1 Robert Sarkany YR 2005 UL http://www.rcpjournals.org/content/5/3/275.abstract AB