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Recruitment and retention challenges and strategies in randomized controlled trials of psychosocial interventions for children with cancer and their parents : a collective case study
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An ecological model of active transportation
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A RE-AIM evaluation of evidence-based multi-level interventions to prevent obesity in adults: a systematic review
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Worksite physical activity interventions and obesity: a review of European studies (the HOPE project)
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Effectiveness of HIV prevention for youth in subSaharan Africa: systematic review and meta-analysis of randomized and nonrandomized trials