looking for participants. The study is to determine whether Vitmin D deficiency contributes to breast cancer. The study is conducted by Grassroots Health which is a consortium of scientists and doctors from universities across North American who research Vitamin D. These researchers formed Grassroots Health publicize the advances made in this field and encourage people to have their Vitamin D levels tested as Vitamin D deficiency is extremely common.
https://www.grassrootshealth.net/proj-welcome?pr=83341