http://ghr.nlm.nih.gov/condition/jacobsen-syndrome Genetics Home Reference: Jacobsen syndrome "Jacobsensyndrome" Jacobsen Syndrome https://ghr.nlm.nih.gov/condition/jacobsen-syndrome 1 in 100,000 newborns 5 and 10 percent Genetics Home Reference (GHR) Genetics Home Reference–Jacobsen syndrome Genetics Home Reference "Jacobsen syndrome" Jacobsen syndrome explained Genetics Home Reference: Jacobsen syndrome "Jacobsen syndrome" http://ghr.nlm.nih.gov/condition/jacobsen-syndrome