[The p-toluenesulfonic acid precipitation reaction].
D001557:Benzenesulfonates; D055633:Immune System Phenomena; D008180:Lupus Erythematosus, Systemic / Q000175:diagnosis*; D013451:Sulfonic Acids / Q000737:chemistry*
D001557:Benzenesulfonates; D013451:Sulfonic Acids; C029501:4-toluenesulfonic acid
LUPUS ERYTHEMATOSUS/diagnosis; SULFONIC ACIDS/chemistry