The new system of testing for doping in sport will have an "extremely deterrent" effect, world football body Fifa's chief medical officer has said.
Professor Jiri Dvorak said testers would now be able to freeze blood and urine samples so that scientists can re-test them later on, potentially using newer technologies to detect performance-enhancing drugs.
"There is a strong evidence that if you re-analyse the samples from past years that new methods would find them, this is an extremely deterrent method," he said.
"Most of the international federations decided to freeze the samples for a number of years.
More top news
It's still pretty wintry out there although the air over the next 12 or so hours will be fractionally less cold than it has been recently.
CCTV shows an acrobatic youth as he caused £5,000 worth of damage when he ran across six cars before attempting a handstand on a seventh.
Detectives have released CCTV footage of the moment a machete wielding thug wearing a mask jumped over the counter at a bookmakers.