With a citation pearl growing strategy, the starting point is one relevant document, because the idea of this search is to find more similar documents similar to the one already found. The authors, title, abstract, and picture captions of the document, along with the descriptors used in describing its contents, are examined, and then those terms that best describe the contents are chosen as search terms in further searches. It is also a good idea to study the reference list of the core document, because useful references can be found there.
Medline offers an opportunity to continue the search automatically using the subject headings of the core document. Source: Medline database, Ovid Technologies <http://ovidsp.uk.ovid.com/spa/ovidweb.cgi?> 28 June 2011.