The essential case companion to First Aid for the® USMLE Step 1 400 high-yield cases First Aid™ Cases for the USMLE Step 1 features 400 well-illustrated cases to help you relate basic science concepts to clinical situations. Each case includes drawings or clinical images with Q&As that reinforce key concepts. Chapters are keyed to Tao Le"s First Aid for the USMLE Step 1 allowing you to simultaneously study cases and high-yield facts. Content that spans the entire exam: General Principles, Behavioral Science, Biochemistry, Microbiology and Immunology, Chapter 4. Pharmacology, Organ Systems, Cardiovascular System, Endocrine System, Gastrointestinal System, Hematology and Oncology, Musculoskeletal System and Connective Tissue, Neurology and Psychiatry, Renal System, Reproductive System, Respiratory System.