4Shang E, Geiger N, Sturm J W, et al. Pump-assisted Enteral Nutrition Can Prevent Aspiration in Bedridden Percutaneous Endoscopic Gastrostomy Patients[ J ]. J PEN J Parenter En- teral Nutr, 2004, 28(3):180-183.
5Renshaw A A, Young N A, Birdsong G G, et al. Comparison of Performance of Conventional and ThinPrep Gynecologic Preparation in the College of American Pathologists Gyne- cologic Cytology Program[ J ]. Arch Pathol Lab Med, 2004, 128(1):17-22.