Ouyang HW, et al. - In this trial, the clinical effect of an adjustable pulse width pulsed dye laser (PDL) was compared to the effect an adjustable pulse width PDL combined with a fractional CO₂ laser in the treatment of immature red hypertrophic scars. Findings suggested a beneficial clinical effect on fresh red hypertrophic scars, with no severe adverse reactions, by using the 595 nm adjustable pulse width PDL combined with the fractional CO₂ fractional laser.