References for “Cold comfort”
Caruso TJ et al, "Treatment of naturally acquired common colds with zinc: A structured review," Clinical Infectious Diseases (September 2007), Vol. 45, pp. 569–574.
Eby GA et al, "Reduction in duration of common colds by zinc gluconate lozenges in a double-blind study," Antimicrobial Agents and Chemotherapy (January 1984), Vol. 25, No. 1, pp. 20–24.
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