Completed on 24 Nov 2014 by Heinrich Mallison.
License: http://creativecommons.org/licenses/by/4.0/
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all fine
overall, all fine. However, I have marked a few places in the MS where the authors could, maybe even should, go into more details (maybe in the form of an appendix) so that using their method becomes easier for others.
I didn't check every individual number. That said, overall everything looks fine. Also, the authors are appropriately cautious and detail clearly what their results are versus conclusions and speculation.
I would like to see two or three extreme data points added - a very obese person or a child. Not a must, but it would go a long way to distinguish this study further from typical regression-based approaches, as it would highlight the strengths very well (assuming it works).
There are a few spelling etc. issues, please fix.
Otherwise, a very good paper.
As I commented in the MS PDF, there are a few things I would like to see added or detailed better - not a must, though!
Sorry I took the full ten days for this! I had other reviews with short deadlines in parallel, otherwise this could have been done in one day.