Commentary to: Posterior urethral valves are more common in boys with hypospadias

I would like to congratulate Dr Lee and colleagues on the considerable amount of work they put into examining patient files and studying the association between hypospadias and posterior urethral valves (PUV). Analyzing retrospective data is always tedious and time-consuming and fraught with many obstacles. The title of the article is rather affirmative and looking in detail at the methodology I wonder if such a statement can truly be made.
Source: Journal of Pediatric Urology - Category: Urology & Nephrology Authors: Tags: Letter to the Editor Source Type: research