Osgood-Schlatter disease.

@article{Whitmore2013OsgoodSchlatterD,
  title={Osgood-Schlatter disease.},
  author={Amber R Whitmore},
  journal={JAAPA : official journal of the American Academy of Physician Assistants},
  year={2013},
  volume={26 10},
  pages={51-2}
}