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APA Citation
Pahkala, K., Hernelahti, M., Heinonen, O. J., Raittinen, P., Hakanen, M., Lagström, H., Viikari, J. S. A., Rönnemaa, T., Raitakari, O. T., & Simell, O. (2013). body mass index, fitness and physical activity from childhood through adolescence. British journal of sports medicine, 47(2), 71–77. http://access.bl.uk/ark:/81055/vdc_100130163270.0x00003f