How to push the impact of 2,299 scientists with 8,000 citations each?

Answer: Be co-author of an autophagy guideline

this is another episode of guidelines paper. More participants listed here – Affiliations listed stopped at 2299 – this means that there are 2299 authors in the manuscript. Unbelievable – how did they manage to get a consensus on what is written. May the first author explain, how the authorship on this guidelines is decided?