The figure varies and is difficult to state precisely, but up to 50% may have been lost by the time the first symptoms appear, and this loss is usually confined to a small area, causing symptoms in, for example, one arm or one leg.
The figure varies and is difficult to state precisely, but up to 50% may have been lost by the time the first symptoms appear, and this loss is usually confined to a small area, causing symptoms in, for example, one arm or one leg.