I am 45 year old woman. My hair is getting very thin, but no bald spots. I have been to see endocrinology and dermatology. I have had lots of blood tests including TSH, T4, Free T4, Free T3, Reverse T3, DHT, Testosterone Free and Total, Estradiol, FSH, LH, etc, all are normal. I have heard about the Revage 670 laser for improving hair growth on the head. Does anybody have any experience with it? Is is any better than Rogaine or a laser comb? Thanks