[1] Univ Western Australia, Ctr Neuromuscular & Neurol Disorders, Perth, WA 6009, Australia
[2] Sir Charles Gairdner Hosp, Dept Neurol, Queen Elizabeth II Med Ctr, Perth, WA, Australia
[3] Sun Yat Sen Univ, Dept Neurol, Affiliated Hosp 3, Guangzhou 510275, Guangdong, Peoples R China
[4] Murdoch Univ, Ctr Clin Immunol & Biomed Stat, Perth, WA, Australia
[5] Royal Perth Hosp, Dept Clin Immunol & Immunogenet, Perth, WA, Australia
[6] Hosp Kuala Lumpur, Dept Neurol, Kuala Lumpur, Malaysia
[7] Univ Western Australia, Marshall Ctr Infect Dis, Sir Charles Gairdner Hosp, Queen Elizabeth II Med Ctr, Perth, WA 6009, Australia