 SAN DIEGO and TORONTO, April 08, 2021 GLOBE NEWSWIRE -- Aptose Biosciences Inc. Nasdaq: APTO; TSX: APS, a clinical-stage company developing highly differentiated therapeutics that target the underlying mechanisms of cancer, today announced that William G. Rice, Ph.D., Chairman, President and Chief Executive Officer, will participate in Canaccord Genuitys 2021 Horizons in Oncology Virtual Conference: 