Efek asam pipemidat, phenazopyridine hcl dan natirum diklofenak pada persepsi nyeri setelah tindakan endoskopi urologi: uji klinis acak terkontrol, tersamar ganda = Effects of pipemidic acid phenazopyridine hcl and sodium diclofenac on pain perception following endoscopic urological surgery double blinded randomized controlled trial