@article{GolleGranacherHoffmannetal.2014,
  author    = {Kathleen Golle and Urs Granacher and Martin Hoffmann and Ditmar Wick and Thomas M{\"u}hlbauer},
  title     = {Effect of living area and sports club participation on physical fitness in children: a 4 year longitudinal study},
  journal   = {BMC public health},
  volume    = {14},
  doi       = {10.1186/1471-2458-14-499},
  year      = {2014},
}