"Are you suggesting that the research is flawed or fraudulent because ipix provided funding?"
Personally I wouldn't put it that strongly, but onlookers tend to view studies sponsored by the company that stands to benefit with more suspicion than independent studies.
Here's why:
"Industry-sponsored studies tend to be biased in favor of the sponsor’s products. Several studies have explored this issue, documenting how the funding source can influence the design, conduct, and publication of research."
Just responding to the assertion that it was independent research. IPIX provided funding and two people associated with IPIX were authors. That's why the paper includes the "Funding" and "Conflicts of Interest" statement.