Laboratory Animals. The animals shall be housed in environmentally controlled rooms with at least 10 air changes per hour. The rooms shall be maintained at a tem- perature of 18 to 26 degrees centigrade and humidity of 40 to 70 percent with a 12–hour light/dark cycle per day. The animal subjects shall be kept in a quar- antine facility for at least 7 days prior to use, and shall be acclimated to the experimental environment for a min- imum of 48 hours prior to treatment.
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Sources: Testing Consent Agreements and Test Rules, Testing Consent Agreements and Test Rules