BoardVitals COMLEX, Shelf Exams, and USMLE This link opens in a new windowLincoln Memorial University has access to BoardVitals, a high-quality exam review tool. You have access to test banks to help prepare for the COMLEX Level 1, Shelf Exams for eight medical specialties and the USMLE Step 1, 2 and 3. First time users will need to register.