Every three years, The Harriet Lane Handbook is carefully updated by residents, edited by chief residents, and reviewed by expert faculty at The Johns Hopkins Hospital. Easy to use, concise, and complete, this essential manual keeps you current with new guidelines, practice parameters, pharmacology, and more. The 23rd Edition of this portable reference continues to be the most widely used and most recognized pediatric reference worldwide—an indispensable resource for pediatric residents, students, nurses, and all healthcare professionals who treat young patients.