He explains in the video that those were his regularly patients. In the one example he gives about the lung failure, I believe he said the guy had been visiting him for the last two years.

EDIT: However, upon further reflection, it is possible that his newer patients are those who have suffered adverse side effects and are coming to him because he's one of the few outspoken doctors addressing said concerns.

He explains in the video that those were his regularly patients. In the one example he gives about the lung failure, I believe he said the guy had been visiting him for the last two years.