National health registries in professional German football: development and first results from the men’s and women’s 1st and 2nd Bundesliga Huber, Lorenz Szymski, Dominik Krutsch, Werner Weber, Johannes Huppertz, Gunnar Zeman, Florian Koller, Michael Pietzonka, Micha Klein, Christian Nagel, Andreas Alt, Volker journal article https://epub.uni-regensburg.de/79387/ https://epub.uni-regensburg.de/79387/1/e003003.full.pdf open access 2026-04-10