NOD2 and autoinflammatory syndrome: The approach to identify YAOS patients, which required documentation pertaining to NOD2 or YAOS and diagnosis code for autoinflammatory syndromes along with a clinical diagnosis of YAOS by a patient’s rheumatology provider, may have missed some cases of YAOS but provided for a more thorough documentation of autoinflammatory signs and symptoms and minimized risks of misclassification.