Look behind the lecture: addressing challenges in retrospective studies of rare and ultra-rare diseases

Following the session at ISPOR—The Professional Society for Health Economics and Outcomes Research's (NJ, USA) Virtual ISPOR Europe 2021 (November 30–December 3), Ajay Sheshadri, Associate Professor at the University of Texas MD Anderson Cancer Center (TX, USA), evaluates the current problems facing retrospective rare and ultra-rare disease studies and provides insight into the potential solutions. Please could you introduce yourself, your organization(s) and provide a brief summary of your career to date? Thank you for the opportunity to talk about rare diseases! My name is Ajay Sheshadri and I am an Associate Professor of Pulmonary Medicine at the University of...