title: Letter: Circulating immune complexes in erythema nodosum and early sarcoidosis.
mesh_terms: D000936:Antigen-Antibody Complex; D003165:Complement System Proteins / Q000032:analysis; D004893:Erythema Nodosum / Q000276:immunology*; D006801:Humans; D012507:Sarcoidosis / Q000276:immunology*
chemical_list: D000936:Antigen-Antibody Complex; D003165:Complement System Proteins