Oatman, Eric (Winter 2005). "The Drug That Changed the World". Volume 25, No. 1. Journal of the College of Physicians and Surgeons: The College of Physicians & Surgeons of Columbia University. Archived from the original on 11 December 2016. Retrieved 9 December 2016.
Oatman, Eric (Winter 2005). "The Drug That Changed the World". Volume 25, No. 1. Journal of the College of Physicians and Surgeons: The College of Physicians & Surgeons of Columbia University. Archived from the original on 11 December 2016. Retrieved 9 December 2016.