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Letter in response to Xiao et al: ED50 and ED95 of intrathecal bupivacaine with or without phenylephrine
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Footnotes
Contributors Both the authors have participated in the literature search, manuscript preparation, and editing.
Competing interests None declared.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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© American Society of Regional Anesthesia & Pain Medicine 2020. No commercial re-use. See rights and permissions. Published by BMJ.