There is a $70 non-refundable processing charge per abstract. (There is a $200 non-refundable abstract processing fee for Late-Breaking Abstracts.) Abstracts will not be submitted until payment information is complete. Please note that this is a processing fee and not a publishing fee — abstracts not selected for presentation at DDW are also subject to the fee. Authors have the option of paying by Visa®, Mastercard®, or American Express®. No purchase orders or checks will be accepted.