And how would this disprove the existence of God?
Quite the contrary. It establishes a biological basis for divine experience. That doesn't prove the existence of God, but thoughtful people will have to take it as a serious piece of evidence.
It is, or course, impossible either to prove or disprove the existence of God, just as it is impossible to prove or disprove the existence of Spain. One's belief in the existence of eithe is based on one's perceptions of his or her experiences, how he or she chooses to interpret those perceptions, what statements made by other persons one chooses to believe or not belive, etc.
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The cheaper the paper, the more important the information. Peter Lynch.
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Price is a crazy and incalculable thing, while Value is an intrinsic and indestructible thing. G.K. Chesterton