1. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, School of Water and Environment, Chang'an University, No. 126, Yanta Road, Xi'an 710054, Shaanxi, China
2. Department of Chemical and Biological Engineering Princeton University, Princeton, New Jersey 08544, USA
3. CAS Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Xining 810001, China