Department of Radiology, University of California, San Diego, La Jolla, CA, USA.|Department of Radiology, University of California, San Diego, La Jolla, CA, USA.|Department of Radiation Sciences, Umeå University, Umeå, Sweden.|Department of Medical Genetics, NORMENT, KG Jebsen Centre, University of Bergen, Bergen, Oslo University Hospital, Oslo, Norway.|Division of Mental Health and Addiction, NORMENT, KG Jebsen Centre, Oslo University Hospital and Institute of Clinical Medicine, University of Oslo, Oslo, Norway.|Department of Statistics, Texas A&M University, College Station, TX, USA.|Department of Radiology, University of California, San Diego, La Jolla, CA, USA.