Diagnostic Imaging of the Kidney and Urinary Tract in Children - Chrispin, A. R. a Gordon, I. a Hall, C. a Metreweli, C.

All unsuccessful revolutions are the same, but each successful one is different in its own distinctive way. The reason why revolutions occur is that new forces attain increasing significance and classic institutions are incapable of accomodating these forces. These successful revolutions produced a new dynamic and new perspectives.