- Correspondence to Prof. Mamas A Mamas, Keele Cardiovascular Research Group, Centre for Prognosis Research, Institute for Primary Care and Health Sciences, Keele University, Stoke-on-Trent, ST4 7QB, UK;
- Received 26 September 2017
- Revised 20 November 2017
- Accepted 21 November 2017
- Published online 7 December 2017.
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