Fig. 1
Schematic drawing of the ELFPMF apparatus and pulse protocol. a Modified Helmholtz coils assembled with three-coil array. b The pulsed signal generator GHY-III. c The open-circuit voltage waveform generated by GHY- III with a repetitive burst frequency at 15 Hz (burst width, 5 ms; burst wait, 60 ms; pulse width, 0.2 ms; pulse wait, 0.02 ms; pulse rise and fall time: 0.3, 2.0 μs)