ANDY SUN2018-09-102018-09-101991http://www.scopus.com/inward/record.url?eid=2-s2.0-0026053049&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/291524Mechanisms of depressed natural killer cell activity in recurrent aphthous ulcersjournal article