There was an error in the Funding statement. The correct statement should be:
This work was supported in part by research grants from the Natural Science Foundation of China (#30772548 to Dr. Zhou), and Foundation from Excellent Master Dissertation of College of Laboratory Medicine at Chongqing Medical University (#201202). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Footnotes
Competing Interests: No competing interests declared.