Does Playing Football (Soccer) Really Increase the Risk of Knee Osteoarthritis? A Systematic Review and Meta-analysis Jonas Olsson Wållgren, MD, MSc1,2, Alfred Ferré-Aniorte, PT3, Eric Hamrin Senorski, PT, PhD1,4, Danny Veznaver, MSc5, Thorkell Snaebjornsson, MD, PhD1,5,6, Kristian Samuelsson Journ...