Citation

Brunet ME, Centers for Disease Control and Prevention, USA, Liggett GM, Mathison JB, Nitzkin JL. MMWR Morb. Mortal. Wkly. Rep. 1990; 39(34): 586-587.

Copyright

(Copyright © 1990, (in public domain), Publisher U.S. Centers for Disease Control and Prevention)

DOI

unavailable

PMID

2117242

Abstract

unavailable.

Keywords: American football