| Study | Reason for exclusion |
|---|---|
| Attena 1995 | Not Oscillococcinum® |
| Brydak 1999 | Not Oscillococcinum® |
| Bungetzianu 1985 | Not Oscillococcinum® |
| Ferley 1987 | Not Oscillococcinum® |
| Heilmann 1992 | Not Oscillococcinum® |
| Hourst 1982 | Not Oscillococcinum® |
| Lapitskaya 2010 | Not placebo‐controlled |
| Lecocq 1985 | Not Oscillococcinum® |
| Lewith 1989 | Not Oscillococcinum® |
| Masciello 1985 | Not placebo‐controlled |
| Nollevaux 1990 | Not Oscillococcinum® |
| Rabe 2004 | Not Oscillococcinum® |
| Rottey 1995 | Not Oscillococcinum® |
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