1. College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan Province 625014, China
2. Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki 00014, Finland
3. Department of Histology and Embryology, College of Basic Medical Sciences, Norman Bethune Health Science Center, Jilin University, Changchun, Jilin Province 130021, China