Frontiers in Psychiatry Sharma, E, Sharma, L P, Balachander, S, Lin, B, Manohar, H, Khanna, P, Lu, C, Garg, K, Thomas, T L, Au, A C L, Selles, R R, Højgaard, D R M A, Skarphedinsson, G & Stewart, S E 2021, ' Comorbidities in Obsessive-Compulsive Disorder Across the Lifespan : A Systematic Review and Meta-Analysis ', Frontiers in Psychiatry, vol. 12, 703701 . https://doi.org/10.3389/fpsyt.2021.703701 Frontiers in Psychiatry, Vol 12 (2021)