Did you really think you had a point there? You look really stupid with your rather short list that goes over 80 years back. According to your own list, this wasn't occasional at all but instead very rare.

First one on the list isn't even valid:

"The investigation into Cherepanov's death continued for several months. In December, reports out of Russia indicated that blood and urine samples collected from Cherepanov showed that he had been engaged in blood doping.[28] This was later clarified, as Russian officials said that what initially appeared to be blood doping was actually an attempt by team officials and doctors to treat Cherepanov's condition surreptitiously."

You'll forgive me if I don't check the rest of your "proof"...