The present study was supported by the National Natural Science Foundation of China (grant no. 81703901), the Doctoral Fund of Education Ministry of China (grant no. 20134425110003), the Guangdong Provincial Major Science and Technology for Special Program of China (grant no. 2012A080202017), the Shandong Province Natural Science Foundation of China (grant no. ZR2016HB56), the Foundation of Overseas Distinguished Taishan Scholars of Shandong Province, and the Collaborative Innovation Center for Research and Development of Traditional Chinese Medicine in Mount Tai.