[Nor]

Of course its dangerous, thats why they are testing it surely, cos they don't know fully what effects it has on humans. Theres danger and then there is danger though and I'd imagine the risks aren't that great as they've no doubt tested it thoroughly previously before moving onto human testing.

Its naive to assume there is zero risk though and that a sum of £3000 is purely for the inconvenience of you having to spend 2 weeks away from home. I reckon the risks would be suitably low to allow human testing in the first place and probably still a good way to make quick cash but there are still risks. If not, why would you be surrounded by doctors and nurses.