Thanks for the link in answer to my question. A tip: if you know the title of an article (here, "Skin microbiota: a source of disease or defence"), and put that

Thanks for the link in answer to my question. A tip: if you know the title of an article (here, "Skin microbiota: a source of disease or defence"), and put that article title into a Google Scholar search, you will often find a copy of the article that is not behind a paywall (here, because it is also hosted on the Pub Med Central public access website). Now I have to read the full text of the article, and see what subsequent articles say on the issue. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2746716/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2746716/