In the paper by Odièvre MH, Bony V, Benkerrou M, Lapouméroulie C, Alberti C, Ducrocq R, Jacqz-Aigrain E, Elion J, and Cartron JP. Modulation of erythroid adhesion receptors expression by hydroxyurea in children with sickle cell disease, Haematologica 2008 Apr; 93(4):502–510, has been published a wrong version of Figure 3. The correct version is now published in the right column.