John Vissing is professor of Neurology at the University of Copenhagen, Denmark, and the Director of the Copenhagen Neuromuscular Center at the National Hospital, Rigshospitalet, in Copenhagen, with 38 dedicated neuromuscular employees. He obtained his MD in 1986 and was then a research fellow at University of Copenhagen and UT, Southwestern Medical Center in Dallas, USA. His research focuses on hereditary muscle diseases. Main research interests are treatment and pathophysiology of metabolic myopathies, muscular dystrophies, myasthenia gravis and channelopathies, discovery of new neuromuscular diseases, rehabilitation of muscle disease including exercise training, MR imaging of muscle, defining outcome measures for natural history and trials and unraveling genotype-phenotype relations in muscle disease. He has authored more than 400 scientific papers on neuromuscular diseases.