Case files. / Eugene C. Toy, MD, Assistant Dean for Educational Programs, Director, Doctoring Courses, Distinguished Teaching Professor of the University of Texas System, Presidential Scholar in Teaching, Professor and Vice Chair of Medical Education, Department of Obstetrics and Gynecology, McGovern Medical School at University of Texas Health Science Center (UTHealth) at Houston, Houston, Texas, Pedro Mancias, MD, Professor, Assistant Dean, Diversity and Inclusion, Distinguished Teaching Professor, Adriana Blood Professor of Pediatrics, McGovern Medical School at University of Texas Health Science Center (UTHealth) at Houston, Houston, Texas, Erin E. Furr Stimming, MD, Professor of Neurology, Director, Neurology Clerkship, McGovern Medical School at University of Texas Health Science Center (UTHealth) at Houston, Houston, Texas, Doris H. Kung, DO, Associate Professor of Neurology, Vice Chair of Education, Department of Neurology, Director, Clinical Science, Baylor College of Medicine, Houston, Texas.