In the above article (Paddick, Reference Paddick, Mkenda, Mbowe, Kisoli, Gray, Dotchin and Walker2017) The corresponding author's details were previously listed incorrectly. The correct details are; contact number +44 191 293 2709 and email address William.gray@nhct.nhs.uk. The original article has been updated with the correct contact details. The publishers apologise for any inconvenience and confusion this error has caused.
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