Does the ‘Cold Cap’ prevent hair loss in chemotherapy?

I have prescribed it for a number of family members. It is a cooling head system that keeps the blood circulation to the scalp low during chemotherapy. On the three family member I recommended using it, none of them lost all of their hair although there was some thinning on one woman with Breast Cancer Chemo, but unlike many of her friends, she kept almost all of her hair for the entire chemotherapy period. (see: https://baldingblog.com/cold-cap-is-now-fda-cleared-to-hold-on-to-ones-hair-during-chemotherapy/ and see other links: https://baldingblog.com/?s=cold+cap ). Psychologically it is a Godsend for women with breast cancer not to be reminded of their disease every time they look in the mirror and see a bald woman.