53231
In a study conducted from 1990 through 1995 , University of New Mexico psychiatrist Rick Strassman found that some volunteers injected with high doses of DMT reported experiences with perceived alien entities .
 University of New Mexico, Rick Strassman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 University of New Mexico, Rick Strassman