Chaomei Chen Yunan Chen Searching for Clinical Evidence in CiteSpace. 2005 AMIA https://knowledge.amia.org/amia-55142-a2005a-1.613296/t-001-1.616182/f-001-1.616183/a-024-1.616618/a-025-1.616615 conf/amia/2005 db/conf/amia/amia2005.html#ChenC05