A Second Class stamp http://al4a.fun/ al4a  It will be at least five years before the technique is ready for human trials, said Ali, but he is confident that this will happen. "Now that we have proved the proof-of-concept, the road is clear to the first set of clinical trials just to see whether it'll work," he said. "It certainly isn't a case of rolling out treatments in five years' time and providing therapies. It's taken us 10 years to get here and it'll take us five years to get started in people."