I challenge any educated lay reader to review those studies and not be impressed. There can always be bigger, better studies. That can be stated about any study ever published. The existing clinical data is positive and statistically highly significant. Different researchers, at different research facilities, using different technology, are able to duplicate the positive findings.
Statistical analysis continues to show consistent high significance.
If the existing studies of chelation therapy were to be accepted as valid, those industries would suffer enormous losses. They have no reason to want to see chelation therapy accepted. Wise consumers will review all existing sources of information and then make up their own minds about what is best for them. A Ford salesman will most likely tell you that a Ford is superior to a Chevrolet and vice versa. Treadmills and angiograms are very effective and often frightening marketing tools for expensive and dangerous invasive therapies.