From the June 20, 1922 New York Times:

“PARIS–Dr. Serge Voronoff’s monkey gland experiments have led to the startling discovery that apparently it is possible to transplant all the vital organs of a chimpanzee to human beings.

‘Already I am using four different glands from every chimpanzee received from Africa, notably thyroid glands for weak-minded children and interstitial glands for the rejuvenation of the aged.’ said Dr. Voronoff. ‘All chimpanzee glands which I have transplanted have thrived so well in the human body that I have tried lesser organs, which also are thriving well. I am experimenting now on major organs and I expect to announce soon that a man may have any new organ.”