How long should a Kesimpta (ofatumumab) 20 mg pre-filled pen be left out of the refrigerator before injection to reach room temperature?

Leave the Kesimpta (ofatumumab) 20 mg pre-filled pen out of the refrigerator for about 15–30 minutes before injection to reach room temperature, keeping it in its original carton until ready to use and leaving the cap on until just before injection.