Some categories of information are away from scope for PubMed, which include: book assessments, specific convention abstracts, obituaries and in memoriam content articles, news and announcements, and transient summaries of study article content. Extra examples are included in XML Help for PubMed Facts Companies: What types of content are acknowledged?. https://alexiszyfht.blogofchange.com/38946179/the-basic-principles-of-help-with-case-study