1. Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
2. National Specialized Hospital for Active Treating of Haematological Diseases, Sofia 1756, Bulgaria
3. Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
4. Unidad de Biofísica (CSIC/UPV-EHU) and Departamento de Bioquímica y Biología Molecular, Universidad del País Vasco, POB 644, 48080 Bilbao, Spain
5. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain