Scharhag Jürgen, Bohm Philipp, Dvorak Jiri, Meyer Tim
Institute for Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany.
FIFA Medical Assessment and Research Centre (F-MARC), Zurich, Switzerland.
Br J Sports Med. 2015 May;49(9):563-5. doi: 10.1136/bjsports-2015-094770.