Possible Association of Female-Pattern Hair Loss with Alteration in Serum 25-Hydroxyvitamin D Levels March 2023 in “Pakistan Journal of Medical and Health Sciences” We don't know much about this study yet. We're trying to become the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on pjmhsonline.com → https://doi.org/10.53350/pjmhs2023172623