1. Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 København Ø, Denmark
2. Center for Chromosome Stability, University of Copenhagen, Blegdamsvej 3B, 2200 København N, Denmark
3. Danish Cancer Society Research Center, Strandboulevarden 49, DK-2100 Copenhagen, Denmark
4. Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen N, Denmark