MyData
Good on you - you must have been pretty young to go through it all, I'll have the 'benefit' of being older. Your story goes a long way to stop me being overly wimpy about it.
According to the literature, marrow is collected in much the same way nowadays. 'Several' puncture holes are made in the skin and pelvic bone and the marrow, 1-1.5 litres of it, are extracted via a syringe. It takes about two hours under a general, although it can be extracted following an epidural. I suspct that over time they have got somewhat more proficient at doing it
As I said before, I'm willing to do this but I would prefer the other method as long as my licence doesn't get pulled.