Recommended reading for those planning to make a LLLT study Check this first:   WALT standards for conduct of randomized controlled trials: http://www.walt.nu/images/stories/files/walt_standard_for_conduct_of_randomized_controlled_trials.pdf   WALT standards for conduct of systematic reviews and meta analyses. http://www.walt.nu/images/stories/files/walt_standard_for_conduct_of_randomized_controlled_trials.pdf   WALT dosage recommendations. http://www.walt.nu/dosage-recommendations.html read more