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Algorithm for the diagnosis of LOPD. Abbreviations: ALT, alanine transaminase; AST, aspartate transaminase; CK, creatine kinase; DBS, dried blood spot; EMG, electromyography; FVC, forced vital capacity; GAA, acid alpha-glucosidase. *Alternative diagnosis made. Adapted with permission from AANEM. Diagnostic Criteria for Late-Onset (Childhood and Adult) Pompe Disease. Muscle Nerve. 2009;40:149–160 [107] © 2009 Wiley Periodicals, Inc
