Priestland, John, Christopher Green, Gabriel G. De la Torre, and Daniel Weaver. “Letter to the Editor: PTSD, Psychedelics, Entity Encounters and the Precautionary Principle”. Journal of Scientific Exploration 39, no. 4 (December 18, 2025): 574–576. Accessed May 14, 2026. https://journalofscientificexploration.org/index.php/jse/article/view/3807.