Comment on

• Risk of mental disorders in subjects with intellectual disability in the Lundby cohort 1947-97.

  Nettelbladt P, Göth M, Bogren M, Mattisson C. Nettelbladt P, et al. Nord J Psychiatry. 2009;63(4):316-21. doi: 10.1080/08039480902759192. Nord J Psychiatry. 2009. PMID: 19229734
• The prevalence of seasonal affective disorder (SAD) in Greenland is related to latitude.

  Kegel M, Dam H, Ali F, Bjerregaard P. Kegel M, et al. Nord J Psychiatry. 2009;63(4):331-5. doi: 10.1080/08039480902799040. Nord J Psychiatry. 2009. PMID: 19306154
• How common are psychotic and bipolar disorders? A 50-year follow-up of the Lundby population.

  Bogren M, Mattisson C, Isberg PE, Nettelbladt P. Bogren M, et al. Nord J Psychiatry. 2009;63(4):336-46. doi: 10.1080/08039480903009118. Nord J Psychiatry. 2009. PMID: 19492244