title: Commentary.
authors.affiliation: Center for Lysosomal and Metabolic Diseases, Departments of Pediatrics, Clinical Genetics, and Neurology, Erasmus MC, Rotterdam, The Netherlands. w.pijnappel@erasmusmc.nl.
authors.forename: W W M P
authors.initials: WW
authors.lastname: Pijnappel
authors.affiliation: Center for Lysosomal and Metabolic Diseases, Departments of Pediatrics, Clinical Genetics, and Neurology, Erasmus MC, Rotterdam, The Netherlands.
authors.forename: Pieter A
authors.initials: PA
authors.lastname: van Doorn
authors.affiliation: Center for Lysosomal and Metabolic Diseases, Departments of Pediatrics, Clinical Genetics, and Neurology, Erasmus MC, Rotterdam, The Netherlands.
authors.forename: Ans T
authors.initials: AT
authors.lastname: van der Ploeg
mesh_terms: D005260:Female; D006801:Humans; D008875:Middle Aged; D018763:Muscle Fatigue; D014336:Troponin
chemical_list: D014336:Troponin