Supplementary information

From the following article:

Widespread requirement for Hedgehog ligand stimulation in growth of digestive tract tumours

David M. Berman, Sunil S. Karhadkar, Anirban Maitra, Rocio Montes de Oca, Meg R. Gerstenblith, Kimberly Briggs, Antony R. Parker, Yutaka Shimada, James R. Eshleman, D. Neil Watkins and Philip A. Beachy

Nature 425, 846-851(23 October 2003)

doi:10.1038/nature01972