{Reference Type}: Journal Article {Title}: A Guideline for the Diagnosis of Pediatric Mitochondrial Disease: The Value of Muscle and Skin Biopsies in the Genetics Era. {Author}: Wortmann SB;Mayr JA;Nuoffer JM;Prokisch H;Sperl W; {Journal}: Neuropediatrics {Volume}: 48 {Issue}: 4 {Year}: 08 2017 {Factor}: 1.696 {DOI}: 10.1055/s-0037-1603776 {Abstract}: