[1] IMIM Hosp Mar, Programa Recerca Canc, Barcelona 08003, Spain
[2] Univ Pompeu Fabra, Dept Ciencies Expt & Salut, Barcelona 08003, Spain
[3] Ctr Regulacio Genom, Barcelona 08003, Spain
[4] Univ Autonoma Barcelona, Dept Bioquim & Biol Mol, Unitat Biofis, Barcelona 08003, Spain
[5] ICREA, Barcelona 08003, Spain