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correction for funding

Posted by Xiangdong on 23 Apr 2014 at 15:06 GMT

I have noticed that the funding agents are missing. This work was supported by the Chicago Biomedical Consortium with support from the Searle Funds at the Chicago Community Trust (to T. L. Vanden Hoek and A.R. Leff), and by a grant from GlaxoSmithKline Center of Excellence (to A. R. Leff).

No competing interests declared.