RT Journal Article SR Electronic T1 Could it be mitochondrial? When and how to investigate JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 90 OP 101 DO 10.1136/jnnp.2006.090050 VO 6 IS 2 A1 Patrick F Chinnery YR 2006 UL http://pn.bmj.com/content/6/2/90.abstract AB