Complications in comparing lasers and LED. Comment on Esper MA, Nicolau RA, Arisawa EA (2011) The effect of two phototherapy protocols on pain control in orthodontic procedure--a preliminary clinical study. Lasers Med Sci 26:657-663
Lasers Med Sci. 2012 Nov;27(6):1257-8.
doi: 10.1007/s10103-011-1004-0.
Epub 2011 Oct 14.