1School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland
2Department of Ophthalmology, Royal Group Hospitals, Belfast, Northern Ireland
#Contributed equally to this work
*Corresponding Author:
Professor Geoff McMullan, School of Biomedical Sciences, University of Ulster, Cromore Road, Coleraine, BT52 1SA, UK, Fax: +44-2870-324375