The following publications are possibly variants of this publication:
- Research Paper: Expanding the Extent of a UMLS Semantic Type via Group Neighborhood AuditingYan Chen, Huanying Gu, Yehoshua Perl, Michael Halper, Junchuan Xu. jamia, 16(5):746-757, 2009. [doi]
- Overcoming an obstacle in expanding a UMLS semantic type extentYan Chen, Huanying Gu, Yehoshua Perl, James Geller. jbi, 45(1):61-70, 2012. [doi]