Effectiveness of a propolis and zinc solution in preventing acute otitis media in children with a history of recurrent acute otitis media.
Int J Immunopathol Pharmacol. 2010 Apr-Jun;23(2):567-75. doi: 10.1177/039463201002300219.
Int J Immunopathol Pharmacol. 2010.
PMID: 20646352
Free article.
Clinical Trial.