*Division of Perioperative Care and Emergency Medicine
†Division of Heart and Lungs
‡Division of Surgical Specialties
§Division of Neurosciences
¶Division Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, NL.
Reprints: Wilton A. van Klei, MD, PhD, Anesthesiologist, Division of Perioperative Care and Emergency Medicine, Local mail Q04.2.313, University Medical Centre Utrecht, PO box 85500, 3508 GA Utrecht, NL. E-mail: [email protected].
Disclosure: Supported by departmental sources only.
All authors have completed the Unified Competing Interest form at www.icmje.org/coi_disclosure.pdf (available on request from the corresponding author) and declare that none of the authors have support from a company for the submitted work; none have relationships with companies that might have an interest in the submitted work in the previous 3 years; their spouses, partners, or children have no financial relationships that may be relevant to the submitted work; and none have nonfinancial interests that may be relevant to the submitted work.
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Ethical approval: According to Dutch law, as only routinely collected patient data were used and data were anonymized before analysis, hospital ethics board approval was not required.