Birth year data was available from 1982/88 to 2001, a period during which neonatal care changed markedly with, for example, the use antenatal corticosteroids and
surfactant replacement therapy [99]--[101].
When a massive class - action lawsuit brought the toxic nature of perfluorooctanoic acid (PFOA) to public light, DuPont set their sights on a safer
replacement for the
surfactant that was a key ingredient in Teflon, that which gives the non-stick to non-stick cookware and other sticky things.