found that there were genetic overlaps between PD, UC (BTNL2, HLA, GUCY1A3, and TRIM10), and CD (LRRK2, MROH3P, MAPT, RSPH6A, HLA, SYMPK, and CCNY) (48), indicating that these three have partially common genetic pathways. Here, RSPH6A is linked to Parkinson disease.