Abstract < /h3 > < p class= " a-plus-plus " > Vitamin D deficiency is suggested to be associated with Parkinson ’s disease (PD). Our aim was to investigate the serum 25-hydroxyvitamin D < sub class= " a-plus-plus " > 3 < /sub > (25OHD) levels of PD patients in Turkish cohort, to investigate any association of vitamin D binding protein (GC) genotypes with PD due to ..."> Abstract < /h3 > < p class= " a-plus-plus " > Vitamin D deficiency is suggested to be associated with Parkinson ’s disease (PD). Our aim was to investigate the serum 25-hydroxyvitamin D < sub class= " a-plus-plus " > 3 < /sub > (25OHD) levels of PD patients in Turkish cohort, to investigate any association of vitamin D binding protein (GC) genotypes with PD due to ..." /> Abstract < /h3 > < p class= " a-plus-plus " > Vitamin D deficiency is suggested to be associated with Parkinson ’s disease (PD). Our aim was to investigate the serum 25-hydroxyvitamin D < sub class= " a-plus-plus " > 3 < /sub > (25OHD) levels of PD patients in Turkish cohort, to investigate any association of vitamin D binding protein (GC) genotypes with PD due to ..." />