1.   Both are designed to prevent basal skull injuries, which killed Dale Earnhardt, Kenny Irwin, Adam Petty and Blaise Alexander.

2.   Dr. Steve Bohannon, an emergency physician who works at Daytona International Speedway, said Earnhardt probably died of severe skull injuries.

3.   One fisheries officer received skull injuries Tuesday after being pelted with rocks.

4.   Pleasant Colony sustained a skull injury in the accident and died on the track.

5.   Pleasant County, who sustained a fatal skull injury, remained prone on the track until she was taken away by horse ambulance.

6.   Both Cavagnoud and the coach, who was not immediately identified, suffered serious skull injuries.

7.   Dr. Jan-Olof Svensson at the Sundsvall hospital said in a radio interview that most of the seriously injured had skull injuries or extremity fractures.

8.   Dr. Jan-Olof Svensson at the Sundsvall hospital said in a radio interview that most of the seriously injured had skull injuries or broken limbs.

9.   Gref was in serious condition with skull injuries and broken vertebrae, the Interfax news agency reported Friday.

10.   The German coach was reported to have suffered skull injuries, including a broken jaw.