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Persistent fetal vasculature (PFV), also known as persistent fetal vasculature syndrome (PFVS), and until 1997 known primarily as persistent hyperplastic primary vitreous (PHPV), is a rare congenital anomaly which occurs when blood vessels within the developing eye, known as the embryonic hyaloid vasculature network, fail to regress as they normally would in-utero after the eye is fully developed.
Irwin Shapiro was born in Pittsburgh, Pennsylvania. [1] Little is known of his background or upbringing. His family probably came from what is now Hungary, since his first published books in the late 1930s are translations from Hungarian. Shapiro studied at the Art Students League in New York City, where he is known to have taken at least one ...
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Career. Shapiro was an assistant professor of mathematics at University of Minnesota from 1969 to 1976 and was a visiting professor of economics from 1976 to 1977. He was the chairman of the division of mathematical sciences at North Dakota State University from 1977 to 1985. Shapiro was a visiting scholar at the computer science department at ...