@misc{indiciaec947d2cb7990,
  title = {Sonic hedgehog: making the gradient.},
  author = {D A Bumcrot and A P McMahon},
  year = {1996},
  doi = {10.1016/s1074-5521(96)90077-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/8807822/},
  note = {Source identifier: 8807822}
}