Antithyroid Agents/adverse effects; Congenital Abnormalities/etiology; Hepatic Insufficiency/etiology; Pregnancy Complications/physiopathology; Thyrotoxicosis/physiopathology; Abnormalities, Drug-Induced/epidemiology; Adolescent; Adult; Antithyroid Agents/therapeutic use; Chemical and Drug Induced Liver Injury/epidemiology; Congenital Abnormalities/epidemiology; Drug Prescriptions; Female; Hepatic Insufficiency/epidemiology; Humans; Infant; Infant, Newborn; Insurance, Health; International Classification of Diseases; Methimazole/adverse effects; Methimazole/therapeutic use; Pregnancy; Pregnancy Complications/diagnosis; Pregnancy Complications/drug therapy; Pregnancy Complications/epidemiology; Prenatal Exposure Delayed Effects/epidemiology; Prevalence; Propylthiouracil/adverse effects; Propylthiouracil/therapeutic use; Retrospective Studies; Thyrotoxicosis/diagnosis; Thyrotoxicosis/drug therapy; Thyrotoxicosis/epidemiology; United States/epidemiology; Young Adult