全文获取类型
收费全文 | 2752篇 |
免费 | 182篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 32篇 |
妇产科学 | 64篇 |
基础医学 | 430篇 |
口腔科学 | 40篇 |
临床医学 | 232篇 |
内科学 | 606篇 |
皮肤病学 | 45篇 |
神经病学 | 360篇 |
特种医学 | 74篇 |
外科学 | 284篇 |
综合类 | 16篇 |
一般理论 | 1篇 |
预防医学 | 295篇 |
眼科学 | 46篇 |
药学 | 128篇 |
中国医学 | 2篇 |
肿瘤学 | 261篇 |
出版年
2023年 | 17篇 |
2021年 | 28篇 |
2020年 | 30篇 |
2019年 | 37篇 |
2018年 | 54篇 |
2017年 | 51篇 |
2016年 | 52篇 |
2015年 | 55篇 |
2014年 | 65篇 |
2013年 | 127篇 |
2012年 | 150篇 |
2011年 | 160篇 |
2010年 | 89篇 |
2009年 | 93篇 |
2008年 | 152篇 |
2007年 | 157篇 |
2006年 | 174篇 |
2005年 | 150篇 |
2004年 | 135篇 |
2003年 | 96篇 |
2002年 | 102篇 |
2001年 | 66篇 |
2000年 | 62篇 |
1999年 | 69篇 |
1998年 | 26篇 |
1997年 | 27篇 |
1996年 | 23篇 |
1995年 | 19篇 |
1994年 | 29篇 |
1993年 | 20篇 |
1992年 | 45篇 |
1991年 | 36篇 |
1990年 | 49篇 |
1989年 | 29篇 |
1988年 | 43篇 |
1987年 | 25篇 |
1986年 | 22篇 |
1985年 | 29篇 |
1984年 | 22篇 |
1983年 | 25篇 |
1982年 | 19篇 |
1981年 | 23篇 |
1980年 | 25篇 |
1979年 | 20篇 |
1976年 | 16篇 |
1973年 | 19篇 |
1972年 | 13篇 |
1971年 | 17篇 |
1967年 | 16篇 |
1966年 | 13篇 |
排序方式: 共有2938条查询结果,搜索用时 17 毫秒
1.
2.
3.
4.
5.
Toine M. Lodewick Carsten W.K.P. Arnoldussen Max J. Lahaye Kim M.C. van Mierlo Ulf P. Neumann Regina G. Beets-Tan Cornelis H.C. Dejong Ronald M. van Dam 《HPB : the official journal of the International Hepato Pancreato Biliary Association》2016,18(9):764-772
BackgroundVolumetric assessment of the liver is essential in the prevention of postresectional liver failure after partial hepatectomy. Currently used methods are accurate but time-consuming. This study aimed to test a new automated method for preoperative volumetric liver assessment.MethodsPatients who underwent a contrast enhanced portovenous phase CT-scan prior to hepatectomy in 2012 were included. Total liver volume (TLV) and future remnant liver volume (FRLV) were measured using TeraRecon Aquarius iNtuition® (autosegmentation) and OsiriX® (manual segmentation) software by two observers for each software package. Remnant liver volume percentage (RLV%) was calculated. Time needed to determine TLV and FRLV was measured. Inter-observer variability was assessed using Bland-Altman plots.ResultsTwenty-seven patients were included. There were no significant differences in measured volumes between OsiriX® and iNtuition®. Moreover, there were significant correlations between the OsiriX® observers, the iNtuition® observers and between OsiriX® and iNtuition® post-processing systems (all R2 > 0.97). The median time needed for complete liver volumetric analysis was 18.4 ± 4.9 min with OsiriX® and 5.8 ± 1.7 min using iNtuition® (p < 0.001).ConclusionBoth OsiriX® and iNtuition® liver volumetry are accurate and easily applicable. However, volumetric assessment of the liver with iNtuition® auto-segmentation is three times faster compared to manual OsiriX® volumetry. 相似文献
6.
Nicolaj M Stilling Claus Fristrup André Wettergren Arnas Ugianskis Jacob Nygaard Kathrine Holte Linda Bardram Mogens Sall Michael B Mortensen 《HPB : the official journal of the International Hepato Pancreato Biliary Association》2015,17(5):394-400
Background
The aim of this retrospective study was to evaluate the peri-operative and long-term outcome after early repair with a hepaticojejunostomy (HJ).Methods
Between 1995 and 2010, a nationwide, retrospective multi-centre study was conducted. All iatrogenic bile duct injury (BDI) sustained during a cholecystectomy and repaired with HJ in the five Hepato-Pancreatico-Biliary centres in Denmark were included.Results
In total, 139 patients had an HJ repair. The median time from the BDI to reconstruction was 5 days. A concomitant vascular injury was identified in 26 cases (19%). Post-operative morbidity was 36% and mortality was 4%. Forty-two patients (30%) had a stricture of the HJ. The median follow-up time without stricture was 102 months. Nineteen out of the 42 patients with post-reconstruction biliary strictures had a re-HJ. Twenty-three patients were managed with percutaneous transhepatic cholangiography and dilation. The overall success rate of re-establishing the biliodigestive flow approached 93%. No association was found between timing of repair, concomitant vascular injury, level of injury and stricture formation.Conclusion
In this national, unselected and consecutive cohort of patients with BDI repaired by early HJ we found a considerable risk of long-term complications (e.g. 30% stricture rate) and mortality in both the short- and the long-term perspective. 相似文献7.
Currently, we do not fully understand the underlying mechanisms of how regional adiposity promotes metabolic dysregulation. As adipose tissue expands, there is an increase in chronic systemic low‐grade inflammation due to greater infiltration of immune cells and production of cytokines. This chronic inflammation is thought to play a major role in the development of metabolic complications and disease such as insulin resistance and diabetes. We know that different adipose tissue depots contribute differently to the risk of metabolic disease. People who have an upper body fat distribution around the abdomen are at greater risk of disease than those who tend to store fat in their lower body around the hips and thighs. Thus, it is conceivable that adipose tissue depots contribute differently to the inflammatory milieu as a result of varied infiltration of immune cell types. In this review, we describe the role and function of major resident immune cells in the development of adipose tissue inflammation and discuss their regional differences in the context of metabolic disease risk. We find that although initial studies have found regional differences, a more comprehensive understanding of how immune cells interrupt adipose tissue homeostasis is needed. 相似文献
8.
Variation in general practice prostate‐specific antigen testing and prostate cancer outcomes: An ecological study 下载免费PDF全文
Peter Hjertholm Morten Fenger‐Grøn Mogens Vestergaard Morten B. Christensen Michael Borre Henrik Møller Peter Vedsted 《International journal of cancer. Journal international du cancer》2015,136(2):435-442
Knowledge is sparse about the consequences of variation in prostate‐specific antigen (PSA) testing rates in general practice. This study investigated associations between PSA testing and prostate cancer‐ related outcomes in Danish general practice, where screening for prostate cancer is not recommended. National registers were used to divide general practices into four groups based on their adjusted PSA test rate 2004–2009. We analysed associations between PSA test rate and prostate cancer‐related outcomes using Poisson regression adjusted for potential confounders. We included 368 general practices, 303,098 men and 4,199 incident prostate cancers. Men in the highest testing quartile of practices compared to men in the lowest quartile had increased risk of trans‐rectal ultrasound (incidence rate ratio (IRR): 1.20, 95% CI, 0.95–1.51), biopsy (IRR: 1.76, 95% CI, 1.54–2.02), and getting a prostate cancer diagnosis (IRR: 1.37, 95% CI, 1.23–1.52). More were diagnosed with local stage disease (IRR: 1.61, 95% CI, 1.37–1.89) with no differences regarding regional or distant stage. The IRR for prostatectomy was 2.25 (95% CI, 1.72–2.94) and 1.28 (95% CI, 1.02–1.62) for radiotherapy. No differences in prostate cancer or overall mortality were found between the groups. These results show that the highest PSA testing general practices may not reduce prostate cancer mortality but increase the downstream use of diagnostic and surgical procedures with potentially harmful side effects. 相似文献
9.
10.
Benoit Mesnard Maxime Leroy James Hunter Delphine Kervella Marc-Olivier Timsit Lionel Badet Pascal Glemain Emmanuel Morelon Fanny Buron Moglie Le Quintrec-Donnette Vincent Pernin Marc Ladriere Sophie Girerd Christophe Legendre Antoine Sicard Laeticia Albano Stephane De Vergie Clarisse Kerleau Thomas Prudhomme Jérôme Rigaud Diego Cantarovich Gilles Blancho Georges Karam Magali Giral Simon Ville Julien Branchereau For the Données Informatisées et VAlidées en Transplantation/Computerized VAlidated Data in Transplantation Consortium Affiliations† 《BJU international》2022,129(2):225-233