Table 1.

MST treatment parameters

	Frequency
	100 Hz	60 Hz	50 Hz	25 Hz
Duration	Number of pulses
2	200	120	100
4	400	240	200	100
6	600	360	300
8	800	480	400	200
10	1000	600	500
12		720	600	300
14		840	700
16		960	800	400
18			900
20			1000	500

MST was administered at maximum stimulator output (100% intensity), although there is a roll-off effect at frequencies higher than 60 Hz. The maximum numbers of pulses administered in a single stimulation was 1000 pulses based on device operating specifications. For 25 Hz, the maximum was 500 pulses or 20 s, as this is the maximum duration at which the device could provide continuous stimulation