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Meyer, Ursina; Romann, Michael; Zahner, Lukas; Schindler, Christian; Puder, Jardena J.; Kraenzlin, Marius; Rizzoli, Rene; Kriemler, Susi (2011). Effect of a general school-based physical activity intervention on bone mineral content and density: a cluster-randomized controlled trial Bone, 48(4), pp. 792-797. Elsevier 10.1016/j.bone.2010.11.018
