1. Department of Biophysics and Cell Biology; Medical and Health Science Center, Research Center for Molecular Medicine, University of Debrecen; Nagyerdei krt. 98; H-4032; Debrecen; Hungary
2. German Cancer Research Center (DKFZ), Biophysics of Macromolecules (B040); Im Neuenheimer Feld 580; D-69120; Heidelberg; Germany