1Department of Radiology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon 630-522, Republic of Korea, 
2Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon 630-522, Republic of Korea, 
3Department of Microbiology, Gyeongsang National University School of Medicine, Jinju 660-751, Republic of Korea, 
4Human Derived Material Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea, 
5Unitech Science Co., Ltd., Daejeon 302-120, Republic of Korea
								
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					Corresponding author: 
					Myung-Je Cho , Tel: +82-55-772-8082, 
 
 
			
				Received: 22 April 2014   • Revised: 8 May 2014   • Accepted: 8 May 2014