In the part of your hyperlink called THE HISTORY OF HOW IT HAPPENED, we read: "Because of the internal feuds, a new dental organization was formed in 1859 – the American Dental Association (ADA). This body did NOT condemn the use of mercury, to the extreme now 140 years later; they try to crucify any dentist who tells his or her patients about the dangers of mercury! Many practitioners believe the ADA actually send undercover personnel into offices of practitioners who dare to speak the truth, to gather information against them and challenge their licenses." ..... Wow! ..... This is starting to read like a John LeCarre novel ...... Has anyone named the culprits in the ADA who put their seal of approval on poisonous mercury, in 1859?