ITGB4 and acute lymphoblastic leukemia: Completely reciprocal patterns were observed in the number of attached cell nuclei to laminin‐coated plates (Figure S6A–F): the numbers of attached cell nuclei were significantly decreased upon blocking with anti‐CD49f and anti‐CD29 antibodies in all three Ph‐positive ALL cell lines, while the numbers were nearly unchanged upon blocking with anti‐CD104 antibody.