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Patient human chorionic gonadotropin levels during course of treatment. Levels fell at a slow rate with methotrexate and treatment was changed to the etoposide, methotrexate and dactinomycin alternating with cyclophosphamide and vincristine regime. The human chorionic gonadotropin levels normalised 3 weeks subsequent to this change. Abbreviations: CO, cyclophosphamide and vincristine; EMA, etoposide, methotrexate and dactinomycin; HCG(S), human chorionic gonadotropin.
