Please note that it is the policy of Children's National Hospital to ensure a "drug-free" work environment: a workplace free from the illegal use, possession or distribution of controlled substances (as defined in the Controlled Substances Act), or the misuse of legal substances, by all staff (management, employees and contractors). Children's National surgery center performs nearly 17,000 procedures each year on infants, children and adolescents, including kidney transplants, scoliosis, hernia repairs, and procedures to treat disorders and abnormalities of the esophagus and trachea.