What would your instinctive instant answer be to the following question - Yes or No, and Why? Say you are in end-stage-renal failure, and you will have a choice of going onto dialysis or eventually a renal transplant, both of which could extend your life after renal failure. Then you receive an offer - whilst in end-stage-renal-failure - to take part in a medical experiment to halt the progression of your kidney deterioration. Bare in mind this is an experiment, where the outcome is unknown, but it is conducted by a renal team of high reputation. So, what would your instinctive instant answer be Yes or No, and why? Does your thoughtful answer differ from your instinctive instant answer? Excuse me for asking this but my medical situation forces me to think about this both instinctively and thoughtfully. Thank you for your thoughts on this, Kristina.