Celsion Corporation Urges All Shareholders to Vote at the 2021 Annual Meeting to be Held on Friday June 4, 2021 Calls for All Shareholders to Vote so Quorum Requirement to Hold The Meeting is Met LAWRENCEVILLE, N.J., June 02, 2021 (GLOBE NEWSWIRE) -- Celsion Corporation (NASDAQ: CLSN), a clinical-stage...