Book excerpt: Following the organization of Dr. Marc Sabatine’s bestselling Pocket Medicine manual, Pocket Medicine High-Yield Board Review is an all-new, must-have study guide for advanced medical students; for residents in internal medicine, family medicine, and primary care; and for practitioners. This new review brings you authoritative, trusted content designed to prepare you for success on licensing, certification, and recertification exams and hone your knowledge of internal medicine.