Berthold discovered from his experiments that the testicles were able to affect distant parts of the body by sending chemicals through the blood. What did Dr. Charles Brown Sequard claim about extracts from the testicles?
1) They could be used as the elixir of life
2) They could be used as a treatment for myxedema
3) They could be used to measure the diameter of an artery
4) They could be used to remove the thyroid gland
