Affiliation: | 1. Department of Biostatistics and Epidemiology, Institute for Quantitative Biology, East Tennessee State University, Johnson City, TN, USA;2. Department of Finance, Nanjing Audit University, Nanjing, P.R. Chinazhengs@etsu.edu;4. Department of Mathematics and Statistics, Institute for Quantitative Biology, East Tennessee State University, Johnson City, TN, USA |