| http://www.w3.org/ns/prov#value | - A perlingual therapy mainly using L-DOPA (L-dihydroxyphenylalanine) has conventionally been carried out, but since it is necessary to carry out its internal use for a prolonged period of time, its effect gradually attenuates in many patients who then will suffer from side effects such as wearing off phenomenon, dyskinesia and the like.
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