RT Journal Article SR Electronic T1 Porphyria for the neurologist: the bare essentials JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 255 OP 258 DO 10.1136/jnnp.2006.097527 VO 6 IS 4 A1 T J Peters A1 K R Mills YR 2006 UL http://pn.bmj.com/content/6/4/255.abstract AB