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Image credits
Eyeglasses and financial magazine. Copyright © 2005 Ulrik De Wachter. All rights reserved. Ulrik De Wachter is user Ulrik at stock.xchng.
Statistical formulas. Copyright © Monique Samsen. All rights reserved. Monique Samsen is member photoworld at iStockphoto.
Electronic door lock. Copyright © 2005 Ross Brown. All rights reserved. Ross Brown is user rossbr at stock.xchng.
Wrecked car after an accident. Copyright © 2005 Alejandro González. All rights reserved. Alejandro González is user cremosonic at stock.xchng.
Map showing fatal crash locations of Ford Explorers with Firestone tires. Injury Prevention, April 2004, 10:88-92, figure 2. Reproduced with permission from the BMJ Publishing Group.
File cabinet. Copyright © Luis Carlos Torres. All rights reserved. Luis Carlos Torres is member lucato at iStockphoto.
Man's head being erased. Copyright © 2004 Joshua Blake. All rights reserved. Joshua Blake is member joshblake at iStockphoto.
Van rolling over on test track. Photograph derived from a public domain image taken for the National Highway Traffic Safety Administration.
Graph of van rollover test results. Graphic derived from a public domain image created for the National Highway Traffic Safety Administration.
Computer keyboard. Copyright © 2004 Simon Cataudo. All rights reserved. Simon Cataudo is user scataudo at stock.xchng.
Graphic of United States population distribution in the year 2000. Graphic derived from a public domain image created for the U.S. Census Bureau.
Email icon (i.e., 'at' sign). Copyright © Kuno Hamers. All rights reserved. Kuno Hamers is member dunesmm at iStockphoto.
Copyright © Quality Control Systems Corp. All rights reserved.