@article{BadtkeKetelhutKetelhutetal.1996,
  author    = {Badtke, Gernot and Ketelhut, Reinhard G. and Ketelhut, Kerstin and Messerli, Franz H.},
  title     = {Fitness in the fit : does physical conditioning affect cardiovascular risk factors in middle-aged marathon runners},
  year      = {1996},
  language  = {en}
}