The application of animal tests results to human health is not perfect. SEIC's laboratory is qualified ISO 9001 for reseaarch, development and production. Older amplifiers sometimes were outfitted with phase switches. Scientists tell me that if you can't measure a radiation change with a meter, there is no change. There have been many examples of health impacts scientists could prove occur, but could neither explain nor measure.
Society routinely uses solutions which lack perfect explanation or measurability.
Aspirin has been in use for 80 years to relieve headaches while no one knew exactly how it worked. The reception centers in the brain on which it operates were only identified in the early 1980's. In 1896, Henri Becquerel in France discovered the natural radioactivity of uranium salts. This discovery was questioned for decades by scientists who couldn't measure anything with the instruments available to them. As a result, hundreds of French and Swiss watch factory workers died from mouth cancer because they would paint watch arms with radioactive phosphorous and lick their brushes to thin the tips.