Some types of information are outside of scope for PubMed, for instance: e book reviews, person meeting abstracts, obituaries As well as in memoriam articles or blog posts, news and announcements, and brief summaries of exploration articles or blog posts. Much more examples are included in XML Help for PubMed https://israelnpfgt.blogtov.com/18829646/5-tips-about-harvard-case-studies-you-can-use-today