1 FSHD Europe, Radboud University Medical Centre, P.O. Box 9101, Nijmegen 6500 HB, the Netherlands. Electronic address: nicol.voermans@radboudumc.nl.
2 FSHD Europe, Radboud University Medical Centre, P.O. Box 9101, Nijmegen 6500 HB, the Netherlands.
3 Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands.
4 Nord-Est-Ile de France Neuromuscular Reference Center, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris Myology Institute, Neuromuscular Pathology Reference Center, Groupe Hospitalier Universitaire La Pitié-Salpêtrière, Sorbonne Universités UPMC Univ Paris 06, Paris, France.