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  • A Life Without Pain. Dir. Melody Gilbert. Frozen Feet Films, 2005.
  • American Pain Foundation. Pain Facts & Figures.
  • Bonkowsky et al. An Infant With Primary Tooth Loss and Palmar Hyperkeratosis: A Novel Mutation in the NTRK1 Gene Causing Congenital Insensitivity to Pain With Anhidrosis. Pediatrics 2003 112: e237-e241
  • Ed. Dale Purvis et al. Neuroscience, Second Edition. 2001. Sinauer Associates: Sunderland, MA, 2001.
  • Gajilan, Chris A. "World without pain is hell, parents says." Sept. 26, 2006.
  • "The Girl Who Can't Feel Pain." ABC News. Dec. 9, 2005.
  • "How You Feel Pain." Feb. 13, 2007.
  • Mardy et al. "Congenital Insensitivity to Pain with Anhidrosis: Novel Mutations in the TRKA (NTRK1) Gene Encoding a High-Affinity Receptor for Nerve Growth Factor." The American Journal of Human Genetics. Vol. 64:1570-1579. 1999.
  • NYU School of Medicine and Hospitals Center. Dysautonomia Treatment and Evaluation Center.
  • Online Mendelian Inheritance in Man, OMIM (TM). Johns Hopkins University, Baltimore, MD. MIM Number: {#256800}: {08/10/2005}: .
  • Oppenheim, Keith. "Life full of danger for little girl who can't feel pain." Feb. 3, 2006.