 The idea that people in chronic pain and with a terminal illness should be helped to end their lives is a subject for debate in many governments. But there's one country, Switzerland, which has led the way. It was there in 1998 that the assisted dying society Dignitas was set up. It was the first end-of-life organisation in the world to help people from its own country and non-Swiss citizens to die. Jane Wilkinson has been hearing from the man who was the driving force behind Dignitas.