A J Ryan1. Show Affiliations » 1. Sports Medicine Enterprise, Minneapolis, MN 55436.
Abstract
Mesh: See more » Athletic Injuries/prevention & controlBrain Concussion/diagnosisBrain Concussion/prevention & controlHead Protective DevicesHeadache/etiologyHumansPhysical Education and Training/methods
Year: 1991 PMID: 1751894 PMCID: PMC1478831 DOI: 10.1136/bjsm.25.2.81
Source DB: PubMed Journal: Br J Sports Med ISSN: 0306-3674 Impact factor: 13.800