American Academy of Neurology (AAN) guidelines comply with the AAN Institute Board-approved guideline methodology referenced within the systematic review/guideline.1,2Compliance is ensured by a methodologist working on each project and multiple rounds of AAN Guideline Development, Dissemination, and Implementation Subcommittee review. We believe that Phan et al. are referencing the 2004 recommendation methodology.3The disorders of consciousness guideline used the 2011 AAN guideline manual, as amended,4based on 2011 Institute of Medicine (IOM) standards for evidence-based guidelines.

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