Aha! Great, thanks!

a) it always helps if you state that you are not a Physiotherapist yourself

b) you were asking for a questionnaire - no need! See, you have already asked far more detailed questions in your reply

c) we learn electrotherapy at uni and occasionally, there might be an update course available (e.g. FES)

d) for your research, may I suggest to
1. use subcategories instead of 'electrotherapy' (e.g. Ultrasound, TENS, MES/FES, laser, shortwave, etc....) and
2. use subcategories instead of 'physiotherapist' (e.g. Physio in MSK, Physio in Resp., Physio in Neuro, Physio in Gynae, etc.)

Hope this helps,
Fyzzio