A signed Material Transfer Agreement Addendum for HUB/Organoid Products is required to order this item. No further signed Addendum is required if it was previously submitted and processed in connection with a prior order. We cannot ship this item unless the signed Addendum is in place. To submit the signed Addendum, email it to SalesPermits@atcc.org with a reference to both your account and sales order numbers. Once received, your Addendum will be reviewed, and this item will be released for shipment if all other requirements are met. If you need assistance with your order, please contact our Customer Care team.