Xueli Tang

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BACKGROUND Ventilator-associated pneumonia (VAP) is associated with increased mortality, prolonged length of hospital stay and increased healthcare costs in critically ill patients. Guidelines recommend a semi-recumbent position (30º to 45º) for preventing VAP among patients requiring mechanical ventilation. However, due to methodological limitations in(More)
OBJECTIVES To assess the efficacy and safety of focused ultrasound therapy (FU) and microwave therapy (MW) for cervical ectopy (CE). METHODS We searched PubMed, EMbase, the Cochrane Library, Chinese Biomedical Literature Database (CBM), Chinese Scientific Journals Database (VIP), China Academic Journals Full-text Database (CNKI), and WanFang Data for(More)
The U.S. Social Security program is almost entirely …nanced with payroll taxes. However, other taxes exist that could be used (at least partially) to …nance Social Security bene…ts. Without arguing in favour of the old and controversial idea of reallocating general tax revenue to …nance Social Security, in this study a di¤erent question is asked: What type(More)
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