作者单位:Univ Penn, Div Rheumatol, Philadelphia, PA 19104 USA[1]Childrens Hosp Philadelphia, Div Gastroenterol Hepatol & Nutr, Philadelphia, PA 19104 USA[2]Univ Penn, Div Pulm Allergy & Crit Care, Philadelphia, PA 19104 USA[3]NIAMSD, Vasculitis Translat Res Program, Bethesda, MD 20892 USA[4]