It's actually quite normal for experimental and observational subjects, which is the case for this one. I believe the record is set by one with over 5000 author

It's actually quite normal for experimental and observational subjects, which is the case for this one. I believe the record is set by one with over 5000 authors - see https://www.nature.com/articles/nature.2015.17567 https://www.nature.com/articles/nature.2015.17567 for details.