About the Authors
- Carol Shiels
- Niall M Adams
- Suhail A Islam
- David A Stephens
- Paul S Freemont
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*To whom correspondence should be addressed. E-mail: p.freemont@imperial.ac.uk
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
CS and PSF conceived the paper. CS collected and synthesised the material. NMA and DAS contributed to the statistical and quantitative content. SAI guided the imaging content.