Lest others also experience HN's hug-of-death of the original source, Google's cached version (https://webcache.googleusercontent.com/search?q=cache:bkjo_-...) works as interim alternative version of the original PDF before the link returns or e.g. Wayback Machine has a chance to archive it.
(This aside, heed @asdfasgasdgasdg's very prudent note of caution; other independent and more reputable replications are essential.
As of this writing there are at least 19 such hydroxychloroquine trials in US (https://clinicaltrials.gov/ct2/results?term=Hydroxychloroqui...) and more beyond (though WHO clinical trial site listing them is also apparently under critically-heavy load).)
(This aside, heed @asdfasgasdgasdg's very prudent note of caution; other independent and more reputable replications are essential.
As of this writing there are at least 19 such hydroxychloroquine trials in US (https://clinicaltrials.gov/ct2/results?term=Hydroxychloroqui...) and more beyond (though WHO clinical trial site listing them is also apparently under critically-heavy load).)