It has been discovered that multiple factors contribute to the development of PD - related olfactory dysfunction .
In families where there are individuals with PD , UPSIT can be used to predict whether other first degree relatives will also develop PD .
UPSIT has been discovered that multiple factors contribute to the development of PD - related olfactory dysfunction .
In families where there are individuals with PD , UPSIT can be used to predict whether other first degree relatives will also develop PD .