Microsurgery for brachial plexus injury before versus after 6 months of age: results of the Multicenter Treatment and Outcomes of Brachial Plexus Injury (TOBI) Study - Bauer, A S; Kalish, L A; Adamczyk, M J; Treatment and Outcomes of Brachial Plexus Injury (TOBI) Study Group (J Bone Joint Surg Am, 2020)