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Table 1 Medline search strategy, modified as needed for use in other databases

From: The effect of antenatal education in small classes on obstetric and psycho-social outcomes: a systematic review and meta-analysis protocol

Searcha Medline
1 (antenatal OR prenatal OR pregnancy OR birth OR childbirth OR (labor OR labour) OR obstetric OR (delivery OR deliveries))
2 (education OR “parent education” OR preparation OR “parent preparation” OR “early intervention”)
3 1 AND 2
  1. aFilters: Refined by randomized controlled trial, humans.