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School-based educational and on-site vaccination intervention among adolescents: study protocol of a cluster randomised controlled trial | 357 |
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School-based educational and on-site vaccination intervention among adolescents: study protocol of a cluster randomised controlled trial | 2 | 1 | 4 | 15 | 3 | 7 | 16 |
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2019_Gellert_etal.pdf | 244 |