**7. Acknowledgments**

Dr. Abdel-Latif is supported by the University of Kentucky Clinical and Translational Science Pilot Award and the University of Kentucky Clinical Scholar program.

Dr. Zuba-Surma is supported by the "Polish Foundation of Science" homing program grant number 2008/15.

Dr. Ratajczak is supported by NIH grant R01 CA106281, NIH R01 DK074720, and Stella and Henry Endowment.

We thank Dr. Karapetyan for her technical support for this review.

**Conflict of interest:** None.
