"Primary and Secondary compounds" => 403. "medicinal" => 200. "Monoculture leads to vulnerability" => 404. "Leaf for Life" => 404. And the "medicinal" link to

"Primary and Secondary compounds" => 403. "medicinal" => 200. "Monoculture leads to vulnerability" => 404. "Leaf for Life" => 404. And the "medicinal" link to science direct returns a 403 if I attempt to retrieve the page with curl. So, the sites are still up, but the links are in fact mostly dead.