There is very little out there on this therapy. There is an Oilpulling.com, and they were also looking for testimonials, but when you try to email them, the email is dead. Too bad.
Dr. Karach, the Russian doctor who began publicizing this therapy, from what I believe is an old Ukranian folk cure, had examined the sputum, and found a large amount of bacteria and toxins in it. That info is also on some of the websites we found.
I'm hoping my Ukranian Mother-in-law has a lucid day so I can ask her about this!