How long can Nivestim (filgrastim) pre-filled syringes be stored outside the refrigerator, and at what maximum temperature?

For ambulatory use within their shelf life, Nivestim (filgrastim) pre-filled syringes may be stored outside the refrigerator for one single period of up to 15 days at no more than 25°C, protected from light in the outer carton, and must then be disposed of, not returned to the refrigerator.