Ulster have been left counting the cost of their Heineken Cup quarter-final defeat to Saracens.
John Afoa, Ruan Pienaar, Rory Best, Dan Tuohy, Andrew Trimble and Roger Wilson have all been left requiring treatment as a result of the game.
Best and Pienaar are both facing at least six weeks out of action with an ankle sprain and a shoulder injury respectively while Tuohy and Wilson have been ruled out until May with hand injuries.
Trimble suffered concussion and will have to follow the IRB's return to play protocols, while Afoa will miss this weekend's Pro-12 match against Connacht with a disk injury in his back.