Early high-frequency oscillatory ventilation versus synchronized intermittent mandatory ventilation in very low birth weight infants: a pilot study of two ventilation protocols. - Durand DJ; Asselin JM; Hudak ML; Aschner JL; McArtor RD; Cleary JP; VanMeurs KP; Stewart DL; Shoemaker CT; Wiswell TE; Courtney SE (Journal of perinatology : official journal of the California Perinatal Association, 2001)