scholarly journals Effectiveness of a universal classroom-based preventive intervention (PAX GBG): A research protocol for a matched-pair cluster-randomized controlled trial

2017 ◽  
Vol 8 ◽  
pp. 75-84 ◽  
Author(s):  
Karin Streimann ◽  
Aire Trummal ◽  
Kai Klandorf ◽  
Kirsti Akkermann ◽  
Merike Sisask ◽  
...  
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