title: Postoperative pain relief after hypospadias repair in pediatric patients: regional analgesia versus systemic analgesics.
mesh_terms: D000293:Adolescent; D000765:Anesthesia, Conduction / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D004842:Epispadias / Q000601:surgery*; D006801:Humans; D007223:Infant; D008297:Male; D009407:Nerve Block / Q000009:adverse effects; D010149:Postoperative Pain / Q000517:prevention & control*; D010413:Penis / Q000294:innervation