%0 Letter %T Non-motor symptoms in postural instability/gait difficulty subtype in the early stage of Parkinson's disease. %A Suzuki K %A Fujita H %A Matsubara T %A Hirata K %J Eur J Neurol %V 26 %N 3 %D 03 2019 %M 30724429 %F 6.288 %R 10.1111/ene.13828 %X