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A school-based physical activity program to improve health and fitness in children aged 6-13 years ("Kinder-Sportstudie KISS"): study design of a randomized controlled trial [ISRCTN15360785].
Zahner L, Puder JJ, Roth R, Schmid M, Guldimann R, Pühse U, Knöpfli M, Braun-Fahrländer C, Marti B, Kriemler S. Zahner L, et al. Among authors: puder jj, braun fahrlander c, roth r, kriemler s. BMC Public Health. 2006 Jun 6;6:147. doi: 10.1186/1471-2458-6-147. BMC Public Health. 2006. PMID: 16756652 Free PMC article.