收费全文 | 1659篇 |
免费 | 105篇 |
国内免费 | 6篇 |
耳鼻咽喉 | 31篇 |
儿科学 | 93篇 |
妇产科学 | 31篇 |
基础医学 | 255篇 |
口腔科学 | 96篇 |
临床医学 | 131篇 |
内科学 | 280篇 |
皮肤病学 | 40篇 |
神经病学 | 87篇 |
特种医学 | 104篇 |
外科学 | 167篇 |
综合类 | 46篇 |
预防医学 | 215篇 |
眼科学 | 39篇 |
药学 | 65篇 |
中国医学 | 1篇 |
肿瘤学 | 89篇 |
2022年 | 8篇 |
2021年 | 26篇 |
2020年 | 13篇 |
2019年 | 22篇 |
2018年 | 37篇 |
2017年 | 25篇 |
2016年 | 19篇 |
2015年 | 27篇 |
2014年 | 30篇 |
2013年 | 45篇 |
2012年 | 74篇 |
2011年 | 75篇 |
2010年 | 60篇 |
2009年 | 53篇 |
2008年 | 72篇 |
2007年 | 88篇 |
2006年 | 86篇 |
2005年 | 68篇 |
2004年 | 82篇 |
2003年 | 70篇 |
2002年 | 54篇 |
2001年 | 49篇 |
2000年 | 37篇 |
1999年 | 38篇 |
1998年 | 45篇 |
1997年 | 35篇 |
1996年 | 34篇 |
1995年 | 42篇 |
1994年 | 28篇 |
1993年 | 16篇 |
1992年 | 38篇 |
1991年 | 33篇 |
1990年 | 26篇 |
1989年 | 42篇 |
1988年 | 32篇 |
1987年 | 20篇 |
1986年 | 32篇 |
1985年 | 33篇 |
1984年 | 31篇 |
1983年 | 34篇 |
1982年 | 18篇 |
1981年 | 9篇 |
1980年 | 11篇 |
1979年 | 10篇 |
1978年 | 8篇 |
1977年 | 9篇 |
1976年 | 3篇 |
1974年 | 4篇 |
1972年 | 4篇 |
1967年 | 2篇 |
Methods: The nationwide FinnValve registry included data from 6463 patients who underwent TAVR or SAVR with a bioprosthesis for aortic stenosis from 2008 to 2017.
Results: The annual number of treated patients increased three-fold during the study period. Thirty-day mortality declined from 4.8% to 1.2% for TAVR (p?=?.011) and from 4.1% to 1.8% for SAVR (p?=?.048). Two-year survival improved from 71.4% to 83.9% for TAVR (p?<?.001) and from 87.2% to 91.6% for SAVR (p?=?.006). During the study period, a significant reduction in moderate-to-severe paravalvular regurgitation was observed among TAVR patients and a reduction of the rate of acute kidney injury was observed among both SAVR and TAVR patients. Similarly, the rate of red blood cell transfusion and severe bleeding decreased significantly among SAVR and TAVR patients. Hospital stay declined from 10.4?±?8.4 to 3.7?±?3.4 days after TAVR (p?<?.001) and from 9.0?±?5.9 to 7.8?±?5.1 days after SAVR (p?<?.001).
Conclusions: In Finland, the introduction of TAVR has led to an increase in the invasive treatment of severe aortic stenosis, which was accompanied by improved early outcomes after both SAVR and TAVR.
Clinical Trial Registration: ClinicalTrials.gov Identifier: NCT03385915
- Key Messages
This study demonstrated that the introduction of transcatheter aortic valve replacement has led to its widespread use as an invasive treatment for severe aortic stenosis.
Early and 2-year survival after transcatheter and surgical aortic valve replacement has improved during past decade.
Transcatheter aortic valve replacement has fulfilled its previously unmet clinical needs and has surpassed surgical aortic valve replacement as the most common invasive treatment for aortic stenosis.
Objectives: To analyse the effects of the intervention on dental students' web-based responses at the University of Helsinki, Finland.
Subjects and Methods: A previously developed web-based tool was used for all preclinical and clinical courses from the beginning of the 2006—2007 academic year. We analysed data sets of student feedback for all courses before (2005—2006) and after (2006—2007) the intervention. We then compared the quantity and quality of the students' feedback for the six standardised questions used in the evaluation, and calculated the means and standard deviations of values obtained with a Likert scale. The students' assessments in the open questions were categorised according to key issues.
Results: Implementation of the system resulted in a considerable increase in student feedback: the mean response rate for the preclinical phase rose from 59% (SD 15.0; range 25—80) before the intervention to 90% (SD 9.6; range 72—100) after it. In the clinical phase, the response rates more than doubled from 34% (SD 15.9; range 9—69) to 73% (SD 12.9; range 45—100). The students' assessments showed no significant change despite the marked rise in response rates. The educators' positive attitude towards the students was appreciated (4.2—4.3) whereas the general goals for the courses in the clinical phase seemed unclear to the students (3.4) ( P < 0.05).
Conclusions: Web-based evaluation as an integral part of all courses in the dental curriculum proved successful: shortly after the intervention, we observed a considerable increase in student feedback with no significant change in quality. 相似文献