That is your answer... why hasn't ANYONE connected with medicine run even one study!!!!
here is Dr. Hickey's take from 2004 (email correspondence)
“Time has moved on and the medical profession has FAILED over the past 50 years to produce the required experiments. The budget of say the NIH alone is over 27 billion but over the past 50 years no one has replicated the early vitamin C and heart disease research, which could be done by almost any cardiologist from petty cash. Since Pauling, and others, have promoted vitamin C as a cure for heart disease, it seems silly that a potential cure for the worst killer in the developed nations (atherosclerosis) has not been refuted. To a scientist from any other discipline this lack of interest would be bizarre. It is a fact that the experiments have been done in animals and the results show that ascorbate protects against atherosclerosis and may reverse it. There is some additional evidence from human studies that is consistent with this interpretation. So why have the human studies not been performed? Or we may ask if they have been performed, was the data withheld? The enemies of Pauling, as well as the drug companies, would love to see the Pauling hypothesis discredited. Why have the experiments not been reported?”