See bottom of sidebar for contact information.
If your question pertains to accessing WMH data, please note that the U.S. data is already publicly
available at
http://www.hcp.med.harvard.edu/ncs/ncs_data.php
All other requests for permission to access WMH survey data should be sent to the coordinating center at Harvard Medical School via this email: ronkadm@hcp.med.harvard.edu.