[ensan]

"peer-reviewed long term study"

This is not a silver bullet, even for recently published Nature/Science papers. You need to convince 3-4 people to get your paper published in the end. For many controversial papers, there is a lot of back and forth about the validity of the results (e.g., "Matters Arising" in Nature).

The biggest flaw of this study is relying on subjective reports by the owners. Almost all dog owners I know are used to playing down the severity of their dog's aggressiveness.