From the Department of Neuropsychiatric Epidemiology Unit (S.K., J.K., A.Z., M.W., H.W., A.B.-H., I.S.) and Clinical Neurochemistry Laboratory (S.K., H.Z., K.H., U.A., K.B.,), Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Sweden; and UCL Institute of Neurology (H.Z.), Queen Square, London, UK. (At 2018-05-08)