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Table 2 Search strategy. An example of the comprehensive literature search which will be carried out across the electronic databases, with search terms and limitations applied. This search strategy example is from Embase

From: Respiratory syncytial virus prophylaxis for prevention of recurrent childhood wheeze and asthma: a protocol for a systematic review

#SearchesResults
1Respiratory Syncytial Virus Infections/1279
2“RSV infection*”.mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]4504
3Asthma/211,704
4“asthma development*”.mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]1070
5wheez*.mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]30,231
6Respiratory Hypersensitivity/3915
7atopy.mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]26,375
81 or 25266
93 or 4 or 5 or 6 or 7244,215
108 and 9976
11limit 10 to english language913
12limit 11 to “all child (0 to 18 years)” [Limit not valid in Embase; records were retained]913
13limit 12 to journal article [Limit not valid in Embase; records were retained]913
14(later or subsequent*).mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]1,504,151
15risk factors/537,637
16“clinical factor*”.mp. [mp=title, abstract, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword, floating subheading word, candidate term word]23,741
1714 or 15 or 162,032,400
1813 and 17345
19prophylaxis.mp.205,494
20Primary Prevention/37,244
21monoclonal antibody.mp. or Antibodies, Monoclonal/261,479
22palivizumab.mp. or Palivizumab/2796
23motavizumab.mp.252
24prevention.mp.1,698,423
2519 or 20 or 241,786,756
2621 or 22 or 23263,326
2725 and 2617,965
2818 and 2762