Yes, that's what I meant. No need to question him. If he fell and hurt something than GBS is very unlikely.
After hearing Murray Blackmore at W2W and then more discussion in a break away session it seems that if he is trying to break down the DNA seen in growth to find the proteins created that promote regrowth than a short cut to the specific DNA sequences might come from people like your friend and others who have "recovered" or those who regained more than any doctor thought they might and ask for a small donation of say...blood? I think I volunteered a man I have yet to be formally introduced to as the first donor..Pat Rummersfeld.