An interesting article from 2015 written by Gary Rosen that takes up some valid points regarding the RTL mycotoxin testing. Well worth a read!
http://www.mold-toxins.com/assets/Urine Testing for Mycotoxins - Junk Science or Not 2-22-15.pdf
I don't have the expertise to argue the science, but here is some food for thought. Everything in the mold world is contentious. There is a lot of litigation and therefore a lot of expert witness available, including Rosen:
http://www.mold-free.org/GaryRosen-PhD-CV2.pdf These individuals set up websites with articles that take a certain position which attract lawyers who need an expert to support his or her position. Here is Rosen's
http://www.mold-toxins.com/
He is not a neutral scientist trying to find the truth to help the public. He is very much in the industry, not only as a hired gun, but also as a mold remediator and many other related services:
http://www.mold-free.org/index1.html
In the article, Rosen takes the position that the RTL's mycotoxin testing is invalid and that what it really shows, if anything, is mycotoxins from food. Yet he has written several books that support the position that mold produces mycotoxins which cause illness.
http://www.mold-free.org/index1.html. I have a copy of the book he coauthored entitled "Your Guide to Mold Toxins". His positions in the book were very consistent with Shoemaker. Interestingly, on the one hand he takes a rather unprofessional sarcastic shot at Brewer for offering treatment for mold growing in the sinuses, while on the other hand Rosen offers services for remediation for mold growing in buildings. So what he is saying is that if you are sick from mold you don't need to treat mold growing in your body, instead you need to have your home inspected, tested and remediated which are services he can provided, and if you want to just sell it, he can do that too, since he is also a realtor.
In contrast, Brewer is not gaining new patients due to the fact he is using his mold sinus treatment. Right now it is a six month wait for current patients to see him. I have had many appointments that lasted an hour. He is an in-network doctor that makes whatever insurance pays. He could go out of network and charge pretty much whatever he wants, but he doesn't. He could make an fortune if he did that. He is not selling books. If he is making extra money from the mold sinus treatment I don't know how.
The RTL test presents a major problem for people like Rosen, Shoemaker, Shaller and others who committed to the position that mold illness is a detox issue. If the test is accurate, it shows that people with mold illness can detox just fine and that the issue lies with production of mycotoxins within that body. So Rosen and others have a vested interest in attacking the test itself.