1. Institute of Animal Breeding and Genetics Justus Liebig University Giessen 35390 Germany
2. Interfaculty Bioinformatics Unit University of Bern Bern 3001 Switzerland
3. Swiss Institute of Bioinformatics Lausanne 1015 Switzerland
4. Institute of Genetics University of Bern Bern 3001 Switzerland
5. Clinic of Reproductive Medicine Vetsuisse Faculty University of Zürich Zürich 8057 Switzerland
6. Department for BioMedical Research University of Bern Bern 3001 Switzerland