Stuff like this always reminds me of: https://helix.northwestern.edu/blog/2010/02/when-science-goes-wrong https://helix.northwestern.edu/blog/2010/02/when-scie

Stuff like this always reminds me of: https://helix.northwestern.edu/blog/2010/02/when-science-goes-wrong https://helix.northwestern.edu/blog/2010/02/when-science-goe... I'm guessing they are being as careful as they can in regards to selection bias.