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https://cornellpainclinic.com/stellate-ganglion-block-emerging-treatment-for-ptsd/
https://www.va.gov/healthpartnerships/docs/ccisgbfactsheet.pdf
https://www.militarytimes.com/pay-benefits/2019/11/06/new-research-shows-nerve-injections-are-effective-for-treating-ptsd-symptoms/