Vascularized Thumb Metacarpal Periosteal Flap for Scaphoid Nonunion in Adolescents: A Prospective Cohort Study of 12 Patients - Barrera-Ochoa, S; Mendez-Sanchez, G; Mir-Bullo, X; Knörr, J; Bertelli, J A; Soldado, F (J Hand Surg Am, 2019)