@article{fei2010choline,
  title={Choline PET for monitoring early tumor response to photodynamic therapy},
  author={Fei, Baowei and Wang, Hesheng and Wu, Chunying and Chiu, Song-mao},
  journal={Journal of Nuclear Medicine},
  volume={51},
  number={1},
  pages={130--138},
  year={2010},
  publisher={Soc Nuclear Med}
}