@clacke Right, it's easier to get an actual study than the Nature commentary on it! This one is more complicated because it is the original article, but it is open access: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8497057/
(oh though come to think of it I don't know how that works outside the US--hopefully it's open to you!)
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.