I'm absolutely sure about that. As a student I was working (as a technician) on many medical science conferences, so I had an opportunity to see the "bleeding edge" research presentations. I was shocked by the level of confidence demonstrated by "scientists" who promoted results of their N=5 experiments (without a comparison group) as "convincing". If all therapies are based on such research, we have to be happy that our bodies are impressively self-repairing machines.