Accepted for Publication: June 25, 2012.
Author Contributions:Study concept and design: Slieker, Daams, Jeekel, and Lange. Acquisition of data: Slieker and Daams. Analysis and interpretation of data: Slieker, Daams, Mulder, Jeekel, and Lange. Drafting of the manuscript: Slieker, Daams, and Jeekel. Critical revision of the manuscript for important intellectual content: Slieker, Daams, Mulder, Jeekel, and Lange. Statistical analysis: Slieker. Obtained funding: Jeekel. Administrative, technical, and material support: Mulder and Jeekel. Study supervision: Jeekel and Lange.
Conflict of Interest Disclosures: None reported.
This article was corrected for missing online-only text on February 20th, 2013.