I am going to be getting laser tattoo removal done in 3 different areas of my body (left and right sides of midsection and left shin) with PicoWay. If each area is their own session, how long in between should I wait? Do i need to wait 8-12 weeks even if doing a different section of the body each time? Or can I do one section then a couple weeks later do the second section, then third... like on a rotation but with shorter time frames in between each?