74
Twenty-nine research teams analyzed the same data, and they all reached different results.
(fivethirtyeight.com)
https://fivethirtyeight.com/features/science-isnt-broken/
Another study with the same goal of comparing the results from different research teams found similar disparities, though the graphs aren't quite as pretty.
Just eyeballing the linked image... it looks like most of them agree?
The bias almost certainly exists, according to nearly all analysis here. They just disagree on its magnitude. And for the most part they don't disagree by much.