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The OPVI trial – perioperative hemodynamic optimization using the plethysmographic variability index in orthopedic surgery: study protocol for a multicenter randomized controlled trial

Crossref DOI link: https://doi.org/10.1186/s13063-015-1020-7

Published Online: 2015-11-04

Published Print: 2015-12

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

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