It is important to note that only LRRK2 PD risk allele Y1699C has been tested for lipid-droplet formation, and that LRRK2 alleles associated with both CD and PD (N551K, R1398H, N2081D, G2019S) have not been tested for excess lipid-droplet formation. Here, LRRK2 is linked to Parkinson disease.