A Comparison of a New, Ultrathin-Walled Two-Stage Twin Endotracheal Tube and a Conventional Endotracheal Tube in Very Premature Infants with Respiratory Distress Syndrome: A Pilot Study - Parravicini, Elvira; Baccarelli, Andrea; Wung, Jen Tien; Kolobow, Theodor; Lorenz, John M (American Journal of Perinatology, 2007)