GBA1 and Parkinson disease: Using Centogene’s CentoCards we compared GCase activity across individuals without PD, individuals with idiopathic PD, heterozygous GBA1 carriers with PD-coding risk variants (p.E365K, p.T408M), heterozygous GBA1 carriers with mild Gaucher disease-coding risk variants (p.N409S), heterozygous GBA1 carriers with severe Gaucher disease-coding risk variants (including p.L483P) and rs3115534 variant carriers in heterozygous (GT) and homozygous state (GG).