- Correspondence to Dr Kwadwo Owusu Akuffo, Macular Pigment Research Group, Vision Research Centre, Waterford Institute of Technology, West Campus, Carriganore, Waterford, Ireland;
- Received July 3, 2014
- Revised December 30, 2014
- Accepted January 8, 2015
- First published February 23, 2015.
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