First Aid for the USMLE Step 1 is a veritable blueprint for preparing for this critical exam. This unmatched text is written by carefully chosen students who excelled on the Step 1 exam. First Aid for the USMLE Step 1 provides up to date information about critical concepts and organ systems, including: Biochemistry, Immunology, Microbiology, Pathology, Pharmacology, Cardiovascular system, Endocrine system, Gastrointestinal system, Neurology and Special Senses, Psychiatry, Reproduction.