Times". A reason to avoid primary sources in the biomedical field especially papers reporting results of in vitro experiments is that they are often not replicable 2 3 4 and are therefore unsuitable for use in generating encyclopedic, reliable biomedical content. One way to contribute with a COI is to post on talk-pages, suggesting edits. Clark Construction Group, LLC. In medicine, primary sources include clinical trials, which test new treatments. Archived from the original on February 22, 2017. A lightweight source may sometimes be acceptable for a lightweight claim, but never for an extraordinary claim. As of January 2018, Los Angeles has a total of 740 high-rise buildings over 115 feet (35 m 6 7 90 buildings over 300 feet (91.5 m 8 47 buildings over 400 feet (121.9 m 19 buildings over 600 feet (183 m) in height including two. Proposed Redevelopment and Apartments. Health Sciences Literature Review Made Easy.