RT Journal Article SR Electronic T1 Balo concentric sclerosis in a 23-year-old man JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E937 OP E937 DO 10.1503/cmaj.180048 VO 190 IS 31 A1 Yang, Yi-Chien A1 Tsai, Chon-Haw YR 2018 UL http://www.cmaj.ca/content/190/31/E937.abstract AB