Accepted for Publication: January 25, 2012.
Published Online: April 9, 2012. doi:10.1001/archinternmed.2012.262
Author Contributions: Dr Myung had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Kwak and Myung. Acquisition of data: Kwak and Myung. Analysis and interpretation of data: Kwak, Myung, Lee, and Seo. Drafting of the manuscript: Kwak, Myung, Lee, and Seo. Critical revision of the manuscript for important intellectual content: Kwak, Myung, Lee, and Seo. Statistical analysis: Kwak and Myung.
Group Information: The Korean Meta-analysis Study group members are Seung-Kwon Myung, MD; Woong Ju, MD, PhD; Seung Won Oh, MD; Ji-Hyun Bae, DDS, PhD; Young-Kyun Kim, DDS, PhD; Chang-Hae Park, MD; Young-Jee Jeon, MD; Eun-Hyun Lee, MD; Yoon Jung Chang, MD, PhD; Sang Min Park, MD, PhD; Chun Sik Eom, MD; Yeon Ji Lee, MD; Hyun-Suk Jung, MD; and Sang Mi Kwak, MD.
Financial Disclosure: None reported.
Additional Contributions: Tae Yong Lee, MD, and Jong Sung Kim, MD, contributed to the study.