Actually if you read Man and Machine, they really get into the explanations of this stuff. In fact, I've talked to a few fire-arms instructors and cops about the gun rules, and they are VERY accurate as far as it goes. Having that in mind, I have to assume that the medical background info in the rulebooks is just as weel researched. So take that for what it's worth. Oh, and in 2060, almost no surgery leaves a scar. Medical lasers are such usefull things...
Gabriel