In addition to the extremely expensive process of cloning, for each patient you have to culture stem cells and reliably turn them into the tissue you want with 100% efficiency, so you don't get a single leftover stem cell that will cause tumors.
"We're encouraging landlords to remove machines completely now so they - and any left-over branding - don't act as dusty old adverts for tobacco, " she said.
When you've got a tight single layer, cut the remaining apple quarters in half and strew them over the first layer. (You might have to cut more apples to get a fairly even layer here, or you might have apple quarters leftover.) Don't worry about making this layer beautiful no one will see it, but it will give the finished tart a little height.
