Authors may add co-authors to a previously submitted abstract any time prior to the Dec. 1 submission deadline by logging into the DDW abstract submission site. To edit an abstract, return it to draft status, save your changes to the author string, and then resubmit. Please note that your abstract must be resubmitted prior to the 21:00 Eastern time (UTC –5deadline on Dec. 1 or it will not be considered for presentation at the meeting.