![Increased Renal Echogenicity: A Sonographic Sign for Differentiating Between Obstructive and Nonobstructive Etiologies of in Utero Bladder Distension]()
Increased Renal Echogenicity: A Sonographic Sign for Differentiating Between Obstructive and Nonobstructive Etiologies of in Utero Bladder DistensionKaefer, Martin; Peters, Craig A.; Retik, Alan B.; Benacerraf, Beryl B. · The Journal of Urology · 1997