Evaluation of double-folded meatal-based flap (modified Mathieu) in redo circumcised distal penile hypospadias: a prospective multicenter study oleh Salah Nagla, Mohammed Radwan, Mohamed Alhefnawy, Ahmed Ghaith, Ayman M. Hagrass, Mohammed Shalaby, Mohammed Awad, Mohamed Ahmed Negm, Samir Elgamal