I have poikiloderma but the dermotoligist that diagnosed me said it will be 3 sessions at $1400 per session to treat my back of neck and front of neck/chest (just top area of chest it didnt really go beyond bottom of my neck. None on face. Is this like the going rate because others tell me they did it much much less. Plus my derm said there was no guarantee 3 times was enough and it could be 4 or 5. I really want to get rid of this