1. Bioinformatics and Biostatistics Neogen GeneSeek Lincoln NE 68504 USA
2. Department of Animal Sciences University of Wisconsin Madison WI 53706 USA
3. Department of Statistics University of Nebraska Lincoln NE 68583 USA
4. College of Animal Science and Technology Hunan Agricultural University Changsha Hunan 410128 China
5. Quality Assurance Neogen GeneSeek Lincoln NE 68504 USA