[1] Stavanger Univ Hosp, Ctr Age Related Med SESAM, Stavanger, Norway
[2] Univ Bergen, Fac Med, Stavanger, Norway
[3] UCLA, Dept Neurol, David Geffen Sch Med, Los Angeles, CA USA
[4] Univ Nevada, Chambers Grundy Ctr Transformat Neurosci, Dept Brain Hlth, Sch Integrated Hlth Sci, Las Vegas, NV USA
[5] Univ Nevada, Las Vegas, NV USA
[6] Kings Coll London, Wolfson Ctr Age Related Dis, London, England
[7] Univ Exeter, Coll Med & Hlth, Exeter, England
[8] Univ Stavanger, Fac Hlth Sci, Stavanger, Norway
[9] Inst Psychiat, Kings Coll London, Dept Old Age Psychiat, Psychol, London, England
[10] Stavanger Univ Hosp, Ctr Age Related Med SESAM, Gerd Ragna Bloch Thorsens Gate 8, N-4019 Stavanger, Norway