I have some scars (mostly rolling and a few boxcar) on both checks. 1 is fairly deeper while most are moderate. I've previously done 3 sessions of fractional laser treatment with negligible result. A few questions: How many sessions does it usually take to get noticeable, lasting improvement (even after fillers disapppear)? How do fillers last? How long is the procedure and is there any downtime? Typical cost per session (w/ filler) I'mean looking for doctors in the LA area. Thanks!!