I did not correct the whole document. You will find in the attached document the corrections I made.
Here are the main points you need to take into consideration:
The studies used were comparing between the use of laser and
cryotherapy or other types of treatment.
Our main concentration would be to concentrate on the effects of laser from these studies.
Please look at the study highlighted in yellow and see how it was corrected, then do the same with the study highlighted in blue, and the other studies.
If you have any questions please contact me.