eighty-seven previously untreated patients with pathologic stage ia , ii ( a or b ) , or iiia hodgkin 's disease were randomized over a 48-month period to receive either megavoltage extended field radiotherapy alone or megavoltage radiotherapy limited to involved lymph node sites ( including at least an upper mantle field ) followed by combination chemotherapy with nitrogen mustard , vincristine , prednisone , and procarbazine ( mopp ) .
C0019829
hodgkin 's disease
C0033223
procarbazine