This research guide qualifies for 1 general continuing education (CE) unit. The Oregon Board of Naturopathic Medicine has approved this educational content for 1 “general” CE unit for naturopathic physicians. Naturopathic physicians licensed in any U.S. state except California may obtain general CE by reading this guide and completing a 10-question test on the material contained within the clinical topic. Click the button below to take the test for FREE, thanks to an educational grant from Natural Immunogenics Corp. Upon successful completion, you will receive an instant certificate of completion. This CE approval may also qualify for the CE requirements of other practitioner types.