收费全文 | 748篇 |
免费 | 39篇 |
国内免费 | 6篇 |
耳鼻咽喉 | 4篇 |
儿科学 | 35篇 |
妇产科学 | 6篇 |
基础医学 | 78篇 |
口腔科学 | 35篇 |
临床医学 | 76篇 |
内科学 | 168篇 |
皮肤病学 | 11篇 |
神经病学 | 6篇 |
特种医学 | 222篇 |
外科学 | 37篇 |
综合类 | 15篇 |
预防医学 | 21篇 |
眼科学 | 15篇 |
药学 | 23篇 |
肿瘤学 | 41篇 |
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 5篇 |
2019年 | 2篇 |
2018年 | 8篇 |
2017年 | 8篇 |
2016年 | 7篇 |
2015年 | 11篇 |
2014年 | 17篇 |
2013年 | 17篇 |
2012年 | 16篇 |
2011年 | 10篇 |
2010年 | 30篇 |
2009年 | 27篇 |
2008年 | 11篇 |
2007年 | 20篇 |
2006年 | 8篇 |
2005年 | 14篇 |
2004年 | 9篇 |
2003年 | 3篇 |
2002年 | 11篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 8篇 |
1998年 | 46篇 |
1997年 | 56篇 |
1996年 | 52篇 |
1995年 | 47篇 |
1994年 | 47篇 |
1993年 | 30篇 |
1992年 | 11篇 |
1991年 | 10篇 |
1990年 | 11篇 |
1989年 | 19篇 |
1988年 | 30篇 |
1987年 | 14篇 |
1986年 | 29篇 |
1985年 | 26篇 |
1984年 | 12篇 |
1983年 | 18篇 |
1982年 | 18篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 2篇 |
1978年 | 6篇 |
1977年 | 10篇 |
1976年 | 15篇 |
1975年 | 4篇 |
1969年 | 1篇 |
Areas covered: Published observational research investigating the cost of preventable ADRs in Western countries (limited to the USA and European countries).
Expert opinion: Several reviews have been carried out in the field of the ADR epidemiology but fewer reviews have investigated the economic impact of ADRs, and at the time of writing, none has focused on preventable ADRs. The reason why future research should focus on the costs of preventable ADRs is that both the costs and the negative clinical outcomes are preventable, and as such, are a key point of public health policy action. Nevertheless, the present review highlights an important and sobering limitation of published research on the cost of preventable ADRs, of which the major limitation is the heterogeneity in methods and in reporting which limit what can be known through the summarizing work of a systematic review. 相似文献
Methodology Data were collected prospectively between 1 May 1992 and 31 December 1993 on all infants treated with HFOV who had severe respiratory failure despite optimal conventional ventilation.
Results Twenty-eight out of 39 (72%) survived. Of the 15 infants with birthweights <1500g, eight survived. Best survival rates were for infants with pulmonary interstitial emphysema with air leak (4/5) and for infants of birthweight >1500g with hyaline membrane disease (8/8), and meconium aspiration syndrome (7/7). Three infants deteriorated while on HFOV and required extracorporeal membrane oxygenation. Complications were: (i) development of pulmonary interstitial emphysema (1); (ii) recurrence of pneumothorax (3); (iii) hypotension (2); and (iv) bronchopulmonary dysplasia (9). One of the eight infants weighing <1500g who received HFOV in the first week of life developed periventricular haemorrhage.
Conclusion The initial results of HFOV for severe respiratory failure were encouraging although a learning curve was encountered with its introduction. 相似文献