Links
[1] http://ghr.nlm.nih.gov/gene/SHH
[2] http://ghr.nlm.nih.gov/gene/PAX6
[3] http://ghr.nlm.nih.gov/gene/ABCB6
[4] https://disorders.eyes.arizona.edu/references/mutation-sall2-causes-recessive-ocular-coloboma-humans-and-mice
[5] https://disorders.eyes.arizona.edu/references/abcb6-mutations-cause-ocular-coloboma
[6] https://disorders.eyes.arizona.edu/references/ocular-coloboma-reassessment-age-molecular-neuroscience
[7] https://disorders.eyes.arizona.edu/references/iris-coloboma-iris-heterochromia-common-association