1. Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, 2200 Copenhagen N, Denmark
2. Center for Non-Coding RNA in Technology and Health, University of Copenhagen, 1870 Frederiksberg C, Denmark
3. Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
4. Resource on Biocomputing, Visualization, and Informatics, University of California, San Francisco, California 94158-2517, United States