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Continue to ChatA randomized prospective study of BIS guided low-flow sevoflurane anesthesia; is air safer than nitrous oxide? - https://avesis.gazi.edu.tr/publication/details/c70658a4-bed4-43b9-84b9-3a9628112f3a/a-randomized-prospective-study-of-bis-guided-low-flow-sevoflurane-anesthesia-is-air-safer-than-nitrous-oxide