RT Journal Article SR Electronic T1 Trump travel ban means academics must strengthen, not sever, US ties JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E420 OP E421 DO 10.1503/cmaj.170247 VO 189 IS 11 A1 Matthew B. Stanbrook YR 2017 UL http://www.cmaj.ca/content/189/11/E420.abstract AB