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Information on 37 of the 183 players was obtained through the CBPF. It is not possible to infer how the missing information on the remaining 81 players (44 met inclusion criteria and 37 had died) would have influenced the results of the study, but there is no reason to believe that those players or their injuries would differ from the players and the injuries in this study.
Patricio Gaete also wishes to thank the Field Theory Group of the CBPF for hospitality.
(1) Institut fUr Theoretische Physik, University of Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany (2) Centro Brasileiro de Pesquisas Fisicas (CBPF), Rua Dr.
The author also wishes to thank the Field Theory Group of the CBPF for hospitality and PCI/MCT for support.
(2) Laboratorio de Fsica Experimental (LAFEX), Centro Brasileiro de Pesquisas Fisicas (CBPF), Rua Dr.