[Pimples and pustules have various causes. Acne reveals the muscle builder].

@article{Stiefelhagen2006PimplesAP,
  title={[Pimples and pustules have various causes. Acne reveals the muscle builder].},
  author={Peter U Stiefelhagen},
  journal={MMW Fortschritte der Medizin},
  year={2006},
  volume={148 9},
  pages={14-5}
}