This lecture was previously part of the NCCIH Online Continuing Education Series. Its content does not reflect the most current state of the science. Please keep this in mind if you are using this lecture as part of an educational curriculum.
NCCIH will continue to offer CME/CEU credit for this course through December 31, 2015. After that the course will be available for viewing as an archived videolecture, but no credit will be awarded. Courses currently offering CME/CEU credit can be found at nccih.nih.gov/training/videolectures.