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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.
Chad L. Cross, PhD, PStat® Professor-In-Residence, School of Public Health, University of Nevada, Las Vegas, NV, USA
