PMID 11453388. ↑ http://www.uh.edu/engines/epi2582.htm%5B%5D ↑ http://www.medterms.com/script/main/art.asp?articlekey=26245%5B%5D ↑ Anti-Siphon Device; Integra Neurosciences; Label 2002 ↑ http://www.integra-ls.com/products/?product=47, Retrieved November 30, 2009 1 2 3 4 5 Interview with Dr. Gary R. Gropper; Piedmont Neurosurgery; October 15, 2009 ↑ Rizvi, Syed Ali A.; Wood, Martin (2010).