ADORA2A and Parkinson disease: The cumulative statistical analysis revealed no significant results (in any assumed genetic model for both MH (FE) and RE models) for possible association between PD and ADORA2A rs5760423 (1898 PD cases and 1950 controls; OR ranging 0.91–1.05; pz > 0.15) and/or CYP1A2 rs762551 (4205 PD cases and 6562 controls; OR ranging 1.00–1.08; pz > 0.28).