Complex sentence: They also found that the presence of FRIN had no correlation with the strength of the evidence against the medical intervention, and that authors who thought that a treatment was useless were just as likely to recommend researching it further.
Split into simpler sentences: They also found that the presence of FRIN had no correlation with the strength of the evidence against the medical intervention. Authors who thought that a treatment was useless were just as likely to recommend researching it further.