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Patients becoming negative for antibody to antigen 13, SAPA, and antigen 36 by IRA-ELISA. The results for patient 11 are representative of those for six others patients, who became negative for antigen 13 early after treatment. The results for patient 9 are representative of those for three patients, who became negative for SAPA. The results for patient 17 are representative of those for nine patients, who did not become negative for antibody to any recombinant antigen.
