Without such safeguards in place, there is no reason to assume that human cloning will not repeat the messy trial and error of current animal research.
Users of its open service should get quicker, more reliable fixes and be able to locate their positions to within one metre compared with the current GPS-only error of several metres.
Over the next few years, he consulted continuously with wheelchair users, and went through several stages of trial and error before landing on the current model.