Vitamin C, vitamin E, and beta-carotene in relation to common cold incidence in male smokers
Epidemiology (2002) - Comments
pubmed: 11805583  issn: 1044-3983  doi: 10.1097/00001648-200201000-00006 

Harri Hemilä, Jaakko Kaprio, Demetrius Albanes, Olli P. Heinonen, Jarmo Virtamo