This work was supported by Saudi Ministry of Higher Education Grant (to Y.A.), NHS Grampian Endowment Grant (no. 12/21) (to A.R. and S.R.G.), Kuwait Ministry of Health grant (to M.A.T.), and European Social Fund under the Global Grant Measure (VP1-3.1-ŠMM-07-K-02-057) (to A.L. and A.R.). The authors thank Shona Fleming of the School of Biological Sciences, University of Aberdeen, for the technical assistance during their study. The data used to support the findings of this study are available from the corresponding author upon request. A corrigendum for this article has been published.
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