Anita Thapar’s research team faced a barrage of calls and e-mails, some of them hostile, following the publication of their paper on attention-deficit hyperactivity disorder. Here’s what she learnt...The paper was a genome-wide analysis that showed a higher burden of rare chromosomal deletions or duplications in people with attention-deficit hyperactivity disorder (ADHD) than in those unaffected by the condition (N. M. Williams et al. Lancet 376, 1401–1408; 2010).