Concussion questionnaire-ice hockey: The issue of top hockey players in Slovak extra league and SHL returning to original game form after concussion. Questionnaire for Gregor Štefan Horváth’a bachelor’s thesis, student of the 3rd year of FTVŠ UK in ice hockey (head of section ĽH PaedDr. Igor Tóth, PhD.) The questionnaire is anonymous. In case of uncertainty call 0948 942 131. Thank you in advance for filling out the questionnaire..