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Retraction Note: Effects of ultrasound-guided stellate-ganglion block on sleep and regional cerebral oxygen saturation in patients undergoing breast cancer surgery: a randomized, controlled, double-blinded trial

Crossref DOI link: https://doi.org/10.1007/s10877-023-01040-2

Published Online: 2023-06-01

Published Print: 2024-02

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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