Broad Laboratory Testing Does Not Show Utility for Telogen Effluvium: A Retrospective Analysis of 22-Million Laboratory Results Using TriNetX January 2026 in “ JAAD International ” Zachary Neubauer, Qianjin Lu 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 jaadinternational.org →