How long can a Hympavzi 150 mg pre-filled pen be stored at room temperature, and can it then be returned to the refrigerator?

A Hympavzi 150 mg pre-filled pen may be stored in its original carton for one single period of up to 7 days at room temperature (up to 30 °C), must not be returned to the refrigerator, and must be used or discarded before that period ends.