Corresponding authors description Changgui Li, the Affiliated Hospital of Qingdao University 16 October 2015 *Corresponding author: Chang-Gui Li, licgqd@163.com (first) Yong-Yong Shi, yongyongshi@gmail.com (second) Competing interests None declared
Corresponding authors description
16 October 2015
*Corresponding author: Chang-Gui Li, licgqd@163.com (first)
Yong-Yong Shi, yongyongshi@gmail.com (second)
Competing interests
None declared