The 2021 Annual Meeting will be a virtual meeting and stockholders of the record date 4/23/2021 may participate online at http://www.virtualshareholdermeeting.com/ATHX2021 on June 15, 2021 at 8:30 AM Eastern Daylight Time.
To attend the Annual Meeting, you will need the 16-digit control number located on your proxy card. If you do not have your control number, please reach out to your broker to attain it. Please keep your control number in a safe place so it is available to you for the meeting. Please allow ample time for online check-in, which will begin at 8:15 AM EDT.