<qa>  What is the difference in the treatment outcome?3. greater improvement in the treatment outcome decrease in the erythema index following laser treatment of vascular lesions as compared to the laser alone group; improved lightening of the tattoo or nevus of Ota as compared to the laser treatment alone group; significant decrease in hair re-growth as compared to laser treatment alone in patients seeking hair removal; greater improvement of scars, acne and sebaceous hyperplasia. 