The Interaction between HLA-DRB1 and Smoking in Parkinson's Disease Revisited
BACKGROUND: Two studies that examined the interaction between HLA-DRB1 and smoking in Parkinson's disease (PD) yielded findings in opposite directions.OBJECTIVE: To perform a large-scale independent replication of the HLA-DRB1 × smoking interaction.METHODS: We genotyped 182 single nucleotide polymorphism (SNPs) associated with smoking initiation in 12 424 cases and 9480 controls to perform a Mende
