| http://www.w3.org/ns/prov#value | - After adjusting for confounding factors such as year of birth, maternal age, parity and so on, ART twins still had a nearly two-thirds higher risk of being admitted to neo-natal intensive care, and a higher risk of being admitted to hospital in their first three years of life, although this was only statistically significant in their second year, when their risk was nearly two-thirds higher.
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