If you intend to use results obtained with the PathExpand method for a publication, please acknowledge/cite our paper:

E. Glaab, A. Baudot, N. Krasnogor, A. Valencia
Extending pathways and processes using molecular interaction networks to analyse cancer genome data
BMC Bioinformatics (RECOMB Computational Cancer Biology 2010, Oslo, Norway), Vol. 11, No. 1, 597

BibTeX-item:

@article{glaab2010rccb,
  title={Extending pathways and processes using molecular
  interaction networks to analyse cancer genome data},
  author={Glaab, E. and Baudot, A. and Krasnogor, N. and Valencia, A.},
  journal={BMC Bioinformatics}, 
  volume = {11}, 
  number = {1}, 
  pages={597}
  note={RECOMB Computational Cancer Biology 2010},
  year = {2010}
}