title: Letter: N.B.T. test and SLE.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis*; D009580:Nitroblue Tetrazolium; D011014:Pneumonia / Q000175:diagnosis; D013778:Tetrazolium Salts
chemical_list: D013778:Tetrazolium Salts; D009580:Nitroblue Tetrazolium