Relationship between external and internal load indicators and injury using machine learning in professional soccer: a systematic review and meta-analysis - Pillitteri, G.; Petrigna, L.; Ficarra, S.; Giustino, V.; Thomas, E.; Rossi, A.; Clemente, F. M.; Paoli, A.; Petrucci, M.; Bellafiore, M.; Palma, A.; Battaglia, G. (Research in Sports Medicine, 2023)