Efficacy of Platelet-Rich Plasma Therapy for Androgenetic Alopecia: A Systematic Review and Meta-Analysis December 2019 in “ Case medical research ” We don't know much about this study yet. We're maintaining 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 ww1.casemedicalresearch.com →