He is also wrong about there having been no follow-up. Here it is, though only about a smaller fraction of the passengers. https://papers.ssrn.com/sol3/papers.

He is also wrong about there having been no follow-up. Here it is, though only about a smaller fraction of the passengers. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3551331 https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3551331