1. Section of Population Genetics and Embryology, Department of Genetics and Biotechnology, Welfare and Nutrition, Danish Institute of Agricultural Sciences, Research Center Foulum, Tjele, Denmark.
2. Institute of Human Genetics, Aarhus University, Aarhus, Denmark.
3. Section of Nutrition and Production Physiology, Department of Animal Health, Welfare and Nutrition, Danish Institute of Agricultural Sciences, Research Center Foulum, Tjele, Denmark.
4. Beijing Genetics Institutes, Chinese Academy of Sciences, Beijing, China.
5. James D. Watson Institute of Genome Sciences, Zhejiang University, Hangzhou, China.