10 Dec, 12:23
Ireland's John Lacey will referee his first ever RBS 6 Nations match in February, while Alain Rolland is also included in the Elite Panel in what is his last season.
In that review it was discovered that although the 27-year-old Ireland international has made excellent progress in his recovery, some minor issues remain.
As a result, the specialist medical staff treating Ferris are considering several options to ensure that he makes a full and complete return to play.
A decision on a course of action will be made in the coming weeks.