Derby, Richard; Lee, Sang-Heon; Chen, Yung; Kim, Byung-Jo; Lee, Chang-Hyung; Hong, Young-Ki; Lee, Jeong-Eun; Seo, Kwan-Sik
ArticleIssue Date2008CitationARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION, v.89, no.7, pp.1300 - 1304PublisherW B SAUNDERS CO-ELSEVIER INC