Relationship between neonatal pain-related stress adjusted for confounders (morphine exposure, gestational age at birth, illness severity SNAP-II day 1, postnatal infection, surgeries, days of mechanical ventilation) and hair cortisol at age 7 years in boys and girls born very preterm.

<p>Relationship between neonatal pain-related stress adjusted for confounders (morphine exposure, gestational age at birth, illness severity SNAP-II day 1, postnatal infection, surgeries, days of mechanical ventilation) and hair cortisol at age 7 years in boys and girls born very preterm.