1. College of Food Science Shenyang Agricultural University Shenyang 110866 P. R. China
2. Engineering Research Center of Food Fermentation Technology Liaoning 110866 P. R. China
3. Key Laboratory of Microbial Fermentation Technology Innovation Shenyang 110866 P. R. China
4. Heilongjiang Academy of Traditional Chinese Medicine Harbin 150036 P. R. China
5. Children's Neurorehabilitation Laboratory Shenyang Children's Hospital Shenyang 110033 P. R. China
6. Department of Microbiology & Immunology Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore