1. Cell and Developmental Biology Programme, Centre for Genomic Regulation (CRG); Barcelona Spain
2. Universitat Pompeu Fabra (UPF); Barcelona Spain
3. Heidelberg University Biochemistry Center; Heidelberg Germany
4. Unidad de Biofísica (CSIC-UPV/EHU), Department of Biochemistry, University of the Basque Country; Bilbao Spain
5. Telethon Institute of Genetics and Medicine; Napoli Italy
6. Departament de Biologia Cel.lular, Immunologia i Neurociències, Facultat de Medicina, Universitat de Barcelona; Barcelona Spain
7. Facultat de Medicina, Institut d‧Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona; Barcelona Spain
8. Institució Catalana de Recerca i Estudis Avançats (ICREA); Barcelona Spain