1. School of Chemical Engineering and Technology, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an 710049, Shaanxi, P. R. China
2. MicroChemEng Technology Co., Ltd., Jiangyin 214400, P. R. China
3. Department of Gastroenterology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710049, Shaanxi, P. R. China