1. Centre for Genomic Regulation, The Barcelona Institute for Science and Technology, Barcelona, Spain
2. Universitat Pompeu Fabra, Barcelona, Spain
3. EMBL Barcelona, European Molecular Biology Laboratory, Barcelona, Spain
4. Universitat de Barcelona, Barcelona, Spain
5. Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain
6. Pennsylvania State University, Pennsylvania, United States
7. Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain