E for Ecstasy by Nicholas Saunders
Appendix 1: Reference Section

53 A report of five deaths associated with the use of MDEA and MDMA, by Dr. G. Dowling, Journal of the American Medical Association, 1987

Three of the subjects had known medical problems before taking the drug, while one was killed by an electric shock apparently after having climbed a pylon. Two had preexisting heart conditions and one had asthma. MDMA was thought not to have been the primary cause of death in four of these cases, although it is suggested that people with cardiac diseases may be predisposed to sudden death by taking MDMA. The fifth death was not explained by other medical factors, but there was no evidence that it was due to taking MDMA.