1. Department of Microbiology and Molecular Genetics, University of Vermont , Burlington, Vermont 05405, United States
2. School of Mathematics, Shandong University , Jinan, Shandong 250100, China
3. School of Mathematics and Statistics, Ludong University , Yantai, Shandong 264025, China
4. Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center , Lubbock, Texas 79430, United States
5. ICanCME Research Network, Sainte-Justine University Hospital Research Center , Montreal, Quebec H3T 1C5, Canada