Acknowledgments
We wish to thank Farzin Gharahdaghi for mass spectrometry, Meghan Scarpitti, Suping Wang and Kelly Theriault for technical assistance and Shaun Grosskurth for bioinformatics contributions.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.3109/10428194.2016.1171861.