Survey Finds Demand for Hair Restoration Continues to Grow: Number of Patients Worldwide Increased 26% Since 2006 July 2009 in “ Hair transplant forum international ” Robert C. F. Leonard, Karen Sideris 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 ishrs-htforum.org →