Respiratory distress syndrome and antenatal corticosteroid treatment in premature twins. - Hacking, Doug; Watkins, Andrew; Fraser, Simon; Wolfe, Rory; Nolan, Terry; Hacking, D; Watkins, A; Fraser, S; Wolfe, R; Nolan, T (Archives of Disease in Childhood -- Fetal & Neonatal Edition, 2001)