The frequency of anti-aquaporin-4 Ig g antibody in neuromyelitis optica and its spectrum disorders at a single tertiary referral center in malaysia. Viswanathan S, Arip M, Mustafa N, Dhaliwal JS, Rose N, Muda S, Puvanarajah S D, Rafia M H, Wing Loong M C Mult Scler Int. 2014; 2014:568254. Epub 2014 Nov 17. PMID: 25548676. Abstract CommentRecommendBookmarkWatch