The study's veracity notwithstanding, DOs are trained and accredited with the exact same curriculum and standards as MDs plus an additional section in Osteopathy. I don't think it's valid to use the fact that someone is an Osteopath against them.

Science in general, including MD conducted research has a lot of room for improvement.

They are all physicians.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1182327/