All studies mentioned in the article are very small; this assumes, of course, they are accurate, which most studies are not. (https://journals.plos.org/plosmedi

All studies mentioned in the article are very small; this assumes, of course, they are accurate, which most studies are not. (https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.0020124 https://journals.plos.org/plosmedicine/article?id=10.1371/jo...)