You have nothing to be afraid of and, on the contrary, you should consider yourself very lucky for the opportunity. Your daughter will be interviewed by various scientists and then she will be asked to donate blood, and blood components, for scientific investigation. The procedure itself is pretty painless and it's all for a good cause -- subjecting the blood to the most sophisticated analyses ever. You will have some of the most in-depth conversations about SCLS and about cutting-edge treatments you will ever have, and since it's all free of charge, you'll feel like you're finally getting something for all those taxes you pay!