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APA Citation
de Zwart, A., Dekker, J., Roorda, L., van der Esch, M., Lips, P., van Schoor, N., Heijboer, A., Turkstra, F., Gerritsen, M., Häkkinen, A., Bennell, K., Steultjens, M., Lems, W., & van der Leeden, M. (n.d.). the effect of high-intensity resistance training and vitamin d supplementation on muscle strength in patients with knee osteoarthritis: a randomized controlled trial. Osteoarthritis and cartilage, 28(1), S470–. http://access.bl.uk/ark:/81055/vdc_100103929549.0x00001e