Subsequently, Lu et al., (2008) [192] analyzed SNPs in the CNR1 gene in two independent samples from Northern Finland: One sample consisting of 187 family trios (ADHD child and two parents) and a second independent sample with 159 adolescent ADHD cases (n = 159) and 151 controls (n = 151). The gene discussed is CNR1; the disease is attention deficit-hyperactivity disorder.