International guidelines

Europe

Published by:French Society of ENT

Last published:2020

North America

Published by:American College of Radiology

Last published:2022

Published by:American Academy of Otolaryngology-Head and Neck Surgery

Last published:2013

Published by:American Academy of Neurology

Last published:2012 (re-affirmed 2023)

Rest of the world

Published by:International Head and Neck Scientific Group

Last published:2020

Published by:JAMA Facial Plastic Surgery

Last published:2019

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