Milsten, A.M., Maguire, B.J., Bissell, R.A., and Seaman, K.G. (2002). Mass-Gathering Medical Care: A Review of the Literature. (Abstract only.) Prehospital and Disaster Medicine.17(3):151-62.
The authors examine medical utilization rates during large events to determine the role of intervening variables such as temperature, attendance, and alcohol and drug use.