In which patients do you select unilateral instead of bilateral urethral mobilization during dorsal onlay buccal mucosa urethroplasty?

For penile urethroplasty, I will preferentially use unilateral mobilization. For bulbar or more proximal urethroplasties, I tend to do a complete mobilization of the urethra. You can certainly do a unilateral mobilization for these, but I find it is easier to secure the proximal apex with complete mobilization and to completely expose stricture.