levodopa
It is believed that most patients on long-term levodopa therapy will,        sooner or later, develop response fluctuations of varying types and severity       (Riley and Lang, 1993).
It is believed that most patients on long-term  @OBJECT$  @SUBJECT$  @PREDICAT$  will,        sooner or later, develop response fluctuations of varying types and severity       (Riley and Lang, 1993).