E for Ecstasy by Nicholas Saunders
Appendix 1: Reference Section

56 Phone conversation with Dr. Russell Newcombe, lecturer in social policy and social work at Manchester University, 19/2/93

Dr. Newcombe had read a couple of articles about people who have died of heatstroke where mention has been made that the victims used to get high temperatures as children. This could be a clue as to why some people are vulnerable to overheating.

Dr. Newcombe took part in a survey of clubs playing rave music in the North West in 1992 and estimates that there were about 30,000 people attending at weekends. He estimates that the proportion of people using E varied from 50% to 90% depending on the club.