“…In a pioneering study, Bandmann et al in 1997 highlighted a higher incidence of the NAT2 acetylator phenotype in patients with familial Parkinson's disease when compared to controls (Bandmann et al, 1997). Their finding spurred a series of subsequent investigations, and numerous studies have supported the association by reporting a heightened incidence of slow acetylators in cases of sporadic and early-onset Parkinson's disease across various ethnicities (Agúndez et al, 1998;Bandmann et al, 1997;Bandmann et al, 2000;Bialecka et al, 2002;Borlak and Reamon-Buettner, 2006;Chan et al, 2003;Chaudhary et al, 2005;Jiménez-Jiménez et al, 2016;Pandi et al, 2020;Singh et al, 2010;Tan et al, 2000). Several other studies, however, failed to find an association (Dupret et al, 1999;Harhangi et al, 1999;Maraganore et al, 2000;Nicholl et al, 1999;van der Walt et al, 2003).…”