GBA1 and Parkinson disease: Under basal conditions there was no elevation of p62 in Gaucher disease [median 101% (IQR 90–110%) of control, Mann-Whitney U-test P = 0.9], Parkinson’s disease with GBA mutation fibroblasts [median 100% (IQR 95–105%) of control, P = 0.8] or non-manifesting carriers (median 99% of control, P = 0.8).