10. For subjects participating in the MRSpectroscopy component Metal implants or paramagnetic objects contained within the body which may pose a risk to the subject or interfere with the MR scan, as determined in consultation with a neuroradiologist and according to the guidelines set forth in the following reference book commonly used by neuroradiologists: "Guide to MR procedures and metallic objects", F.G. Shellock, Lippincott Williams and Wilkins, NY 2001. (Interview and history)