1. Department of Neurology; Maastricht University Medical Centre; Maastricht; The Netherlands
2. Peripheral Neuropathy Center; Cornell University; New York; NY; USA
3. Grifols Inc; Research Triangle Park; NC; USA
4. MRC Centre for Neuromuscular Disease; National Hospital for Neurology and Neurosurgery; Queen Square; London; UK
5. University Health Network and University of Toronto; Toronto; ON; Canada
6. Department of Neurology; Thomas Jefferson University; Philadelphia; PA; USA
7. Department of Neurology; Vanderbilt University; Nashville; TN; USA
8. Department of Neurology; Erasmus MC; Rotterdam; The Netherlands
9. Department of Neurology; Heinrich Heine University; Düsseldorf; Germany