| The Cochrane database of systematic reviews | Riley DS, Lizogub VG, Zimmermann A, Funk P, Lehmacher W 21 October 2017 |
|---|---|
| : Effectiveness of probiotics on the duration of illness in healthy children and adults who develop common acute respiratory infectious conditions: a systematic review and meta-analysis | King, D; Mitchell, B; Williams, CP; Spurling, GK 20 April 2015 |
"Heated, humidified air for the common cold".
5| In: Journal of Family Practice | Cochrane Database of Systematic Reviews |
|---|---|
| "Efficacy and safety of over-the-counter analgesics in the treatment of common cold and flu" | Rider TH, Zook CE, Boettcher TL, Wick ST, Pancoast JS, Zusman BD 2011 |
: Psychological Stress and Susceptibility to the Common Cold.
14