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The Sage website, including online ordering services, may be unavailable due to system maintenance on 18th January between 2:00 am and 8:30 pm GMT. If you need assistance please contact our Customer Service team. Thank you for your patience and we apologise for the inconvenience.

Christopher Lance Coleman, PhD, MS, MPH, APRN-BC, ACRN, FAAN University of Pennsylvania, School of Nursing, USA