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Analysis of cytotoxicity (XTT test) f in Schwann cells after treatment with PEMF 100 Hz or 1000 Hz and LIPUS 20 kHz or 40 kHz, and after combined treatment with PEMF 100 Hz and LIPUS 20 kHz, PEMF 1000 Hz and LIPUS 20 kHz, PEMF 100 Hz and LIPUS 40 kHz, and PEMF 1000 Hz and LIPUS 40 kHz, as well as in control cells. Cells treated with 10% DMSO (dimethyl sulfoxide) were used as positive control. Cells cultured in standard medium served as negative control.
