Well the thread title certainly made me look. Initial reaction of shock horror as there have been recent high profile cases in Europe of clinical trials of new medicines on healthy young men which went catastrophically wrong resulting in death or permanent disability. I suppose though, taking part in MRI scan trials is a lot less risky than swallowing new drugs, so good luck to you. One way of funding a kilt.

I do give blood on an unpaid voluntary basis, usually a pint twice a year. A professional colleague who served in the South African army tells of conscripts being marched to the clinic to give compulsory blood donations.