Update 2018-03-16-scallop-usecase.md
Update 2018-03-16-scallop-usecase.md

Removed reference to Down's syndrome
neicnordic/experimental.neic.nordforsk.org,neicnordic/neic.no,neicnordic/experimental.neic.nordforsk.org,neicnordic/experimental.neic.nordforsk.org,neicnordic/neic.no,neicnordic/neic.no