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Table 5 Search strategy, Medline via PubMed, 28 August 2017

From: Clinical effectiveness of Invisalign® orthodontic treatment: a systematic review

1. invisalign 158
2. invisalign [tiab] 158
3. clear aligner 48
4. aligner* AND orthodont* 181
5. ortho caps 5
6. orthocaps 1
7. invisible AND orthodont* 69
8. removable AND aligner 33
9. esthetic AND splint AND orthodont* 75
10. transparent* AND orthodont* 63