[1] Sichuan Univ, West China Hosp, Dept Neurol, Chengdu, Peoples R China
[2] NHS Greater Glasgow & Clyde Hlth Board, Paisley, Renfrew, Scotland
[3] Karolinska Inst, Dept Clin Sci, Div Neurol, Danderyd Hosp, Stockholm, Sweden
[4] Univ New South Wales, Fac Med, George Inst Global Hlth, Sydney, NSW, Australia
[5] Mater Dei Hosp, Dept Med, Msida, Malta
[6] Uppsala Univ, Dept Med Sci, Neurol, Uppsala, Sweden
[7] Bashkir State Med Univ, Dept Neurol, Ufa, Russia
[8] Kaohsiung Med Univ, Kaohsiung Med Univ Hosp, Dept Internal Med, Div Geriatr & Gerontol, Kaohsiung, Taiwan
[9] Univ Edinburgh, Dept Geriatr Med, Edinburgh, Midlothian, Scotland
[10] Univ Western Australia, Fac Hlth & Med Sci, Med Sch, Perth, WA, Australia
[11] Univ Edinburgh, Ctr Clin Brain Sci, Edinburgh, Midlothian, Scotland