Just having a read of "The Medical History of Cannabis"
releaf.co.uk
"Researchers in the Department of Pharmacology at St Louis University Medical School in Missouri identified the first cannabinoid receptor, called CB1 Medical, in 1988. They found THC activates this receptor, causing some of the biological responses that are associated with cannabis. This caused a snowball effect in research and shortly afterwards Raphael Mechoulam’s team discovered the body was producing its own natural cannabinoids, anandamide and 2-arachidonoylglycerol (2-AG), to interact with cannabinoid receptors to regulate everyday functions."
Shame they're not 'first' with their client service skills !

The history of medical cannabis: Ancient China to modern times
The history of medical cannabis can be seen in some of the earth’s earliest records, where the plant appears under various names.
"Researchers in the Department of Pharmacology at St Louis University Medical School in Missouri identified the first cannabinoid receptor, called CB1 Medical, in 1988. They found THC activates this receptor, causing some of the biological responses that are associated with cannabis. This caused a snowball effect in research and shortly afterwards Raphael Mechoulam’s team discovered the body was producing its own natural cannabinoids, anandamide and 2-arachidonoylglycerol (2-AG), to interact with cannabinoid receptors to regulate everyday functions."
Shame they're not 'first' with their client service skills !