113 Views | 142 Downloads
Correspondence: hjiang1@usf.edu; Tel.: +1-813-974-5253.
X.D. designed and built the device and the system, performed experiments, analyzed the data, and wrote the paper.
W.Q. and L.Y. prepared the samples and animals.
H.Y. helped with the analysis of the data.
H.J. directed and supervised the project, and wrote the paper.
The idea originated from the discussion between X.D. and H.J.
The authors declare no conflict of interest.
This research was supported in part by funds from the University of South Florida.
© 2017 by the authors.