TRANSFECTION BY POLYETHYLENEIMINE-COATED MAGNETIC NANOPARTICLES: FINE-TUNING THE CONDITION FOR ELECTROPHYSIOLOGICAL EXPERIMENTS Article Svoboda O., Fohlerova Z., Baiazitova L., Mlynek P., Samouylov K., Provaznik I., Hubalek J. Journal of Biomedical Nanotechnology. American Scientific Publishers. Vol. 14. 2018. P. 1505-1514