Age of early specialization, competitive volume, injury, and sleep habits in youth sport: A preliminary study of us youth basketball - Meisel, P. L.; DiFiori, J. P.; Côté, J.; Nguyen, J. T.; Brenner, J. S.; Malina, R. M.; Ryan III, E.; Güllich, A. (Sports Health: A Multidisciplinary Approach, 2022)