全文获取类型
收费全文 | 542篇 |
免费 | 40篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 12篇 |
妇产科学 | 26篇 |
基础医学 | 90篇 |
口腔科学 | 22篇 |
临床医学 | 41篇 |
内科学 | 132篇 |
皮肤病学 | 2篇 |
神经病学 | 50篇 |
特种医学 | 6篇 |
外科学 | 77篇 |
综合类 | 11篇 |
一般理论 | 1篇 |
预防医学 | 33篇 |
眼科学 | 24篇 |
药学 | 20篇 |
中国医学 | 1篇 |
肿瘤学 | 34篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 33篇 |
2020年 | 13篇 |
2019年 | 19篇 |
2018年 | 31篇 |
2017年 | 13篇 |
2016年 | 24篇 |
2015年 | 20篇 |
2014年 | 28篇 |
2013年 | 39篇 |
2012年 | 34篇 |
2011年 | 47篇 |
2010年 | 22篇 |
2009年 | 23篇 |
2008年 | 23篇 |
2007年 | 31篇 |
2006年 | 26篇 |
2005年 | 25篇 |
2004年 | 33篇 |
2003年 | 23篇 |
2002年 | 20篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 6篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1990年 | 2篇 |
1989年 | 5篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有588条查询结果,搜索用时 31 毫秒
1.
Or Kriger Yaniv Lustig Carmit Cohen Sharon Amit Asaf Biber Galia Barkai Liron Talmi Shiraz Gefen-Halevi Bella Mechnik Gili Regev-Yochay 《Clinical microbiology and infection》2021,27(3):474.e1-474.e3
ObjectiveThe role of school closure in mitigating coronavirus disease 2019 (COVID-19) transmission has been questioned. In our medical centre, during a 9-week national lockdown, an alternative school was opened for health-care workers' (HCW) children with a small number of children per class and strict symptom surveillance. After lockdown was lifted we screened children and their parents for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) serology.MethodsWe conducted a cross-sectional study of HCW parents and their children after one teacher contracted COVID-19 following exposure at home and 53 children were exposed, isolated and tested by RT-PCR. We compared families with children attending the alternative school with families whose children who remained at home during the 9-week lockdown. Epidemiological and medical data were collected using a short questionnaire; nasopharyngeal and oropharyngeal swabs were obtained and tested for SARS-CoV-2 by RT-PCR, and blood was collected for SARS-CoV-2 IgA and IgG titres.ResultsA total of 435 children attended the Sheba alternative school. Among the 53 children exposed to the infected teacher, none tested positive by RT-PCR. Of these, 18 children–parent pairs were tested for serology and all were negative. A total of 106/435 (24%) children and their 78 parents were recruited for the cross-sectional study; 70 attended the Sheba school and 36 did not. Approximately 16% of children in either group reported symptoms (11/70 in the school group and 6/36 in the ‘stay home’ group), but SARS-CoV-2 was not detected by PCR in any, and previous exposure, as determined by serological tests, was low and not significantly different between the groups.ConclusionIn an alternative school for children of HCWs, active during COVID-19 national outbreak, we found no evidence of increased infection compared with children that stayed home. 相似文献
2.
3.
T-cell phenotype as a risk factor for periodontal disease 总被引:1,自引:0,他引:1
4.
Nimrod Dar Shani Pillar Asaf Friehmann Avner Belkin Shay Ofir 《International ophthalmology》2020,40(1):73-79
To compare the clinical features, visual outcomes and causative organisms between endophthalmitis secondary to cataract surgery or to intravitreal injections (IVI). Meir Medical Center, Kfar Saba, Israel. Retrospective, non-randomized comparative chart review. Medical records of patients with proven or suspected endophthalmitis admitted to the Ophthalmology Department at Meir Medical Center 2/2002–2/2017 were reviewed. Clinical characteristics including presenting and final visual acuity (VA) outcomes, causative organisms and time to admission were assessed. Among 84 patients in our study, 35 had preceding cataract surgery and 12 had preceding IVI. The post-cataract group showed a significant improvement in VA following treatment with a presenting and final VA (logMar ± SD) of (1.80 ± 0.54 and 1.39 ± 0.65, P < 0.01) as opposed to the post-IVI group (1.72 ± 0.26 and 1.81 ± 0.32, P = 0.692), while most patients in the cataract group exhibited some degree of VA recovery (70.96%). Patients undergoing cataract surgery were divided into two separate groups; those who underwent cataract surgery in a private center and those operated at a public center. Patients undergoing surgery at a private medical center showed improvement in VA outcomes following treatment (1.80 ± 0.57 and 1.13 ± 0.66, P < 0.01) as opposed to those operated on at our public medical center. Overall, patients with endophthalmitis following cataract surgery had better visual outcomes and were more likely to show a VA improvement following treatment when compared with endophthalmitis following IVI. Final VA outcomes of patients with endophthalmitis after cataract surgery performed in a private center were better than those operated on and treated in a public medical center. 相似文献
5.
Miklosh Bala Tali Kaufman Asaf Keidar Orly Zelig Gideon Zamir Sigalit Mudhi-Orenshat Tali Bdolah-Abram Avraham I. Rivkind Gidon Almogy 《Injury》2014
Introduction
Knowledge of patterns of blood use in the care of mass casualty settings is important for preparedness of medical centre resources and for maximising survival when blood supplies are limited. Our objectives were to review of our experience with the use of blood products and define the utilisation of blood transfusion following suicide bombing attacks.Patients and methods
We conducted a retrospective analysis of blood and blood product transfusion following civilian bombing attacks at a level I trauma centre in Jerusalem, Israel from 2000 to 2005. The study group consisted of 137 patients who were admitted following 17 suicide bombing attacks which were carried out in Jerusalem during the 5-year period. Demographic data, number of units of blood and blood products transfused and the need for massive transfusions were recorded and analyzed.Results
Fifty-three patients received blood transfusions (38.7%). There were 33 males (62.2%) with a median ISS of 13 (range 4–25). These 53 patients received 524 PRBC, 42 WB, and 449 FFP. The mean number of PRBC transfused/admitted patient was 3.82 units (range 0–59). Thirty patients (21.9%) received 236 PRBC (45% of total PRBC) at the first 2 h. The ratio of ordered to transfused blood was 946:524. The FFP:PRBC ratio for all transfused patients was 1:1.17. The number of PRBC transfused per attack correlated with the number of patients admitted per attack. The most commonly transfused blood type was A (52.3%). Only 18 units of uncrossed-matched blood were transfused (3.3% of total). 14 patients (10.2%) received massive transfusions. These patients received 399 PRBC (76.1% of total units transfused) and the average number of PRBC transfused was 28.5/patient (10–59).Conclusions
More than 1/3 of casualties admitted following civilian bombing attacks received transfusions, most in the first 2 h. Large-scale attacks will require more blood and blood products than small-scale attacks. Twice the number of PRBC ordered than transfused reflects a known trend for over-triage during the initial assessment following bombing attacks. One tenth of patients received massive transfusion. 相似文献6.
Kent Ilan Geffen Noa Stein Assaf Rudnicki Yaron Friehmann Asaf Avital Shmuel 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2020,258(3):607-611
Graefe's Archive for Clinical and Experimental Ophthalmology - Colonoscopy is an endoscopic examination of the bowel. It requires insufflation of the large bowel lumen with gas which leads to... 相似文献
7.
Asaf Vivante Stefan Kohl Daw-Yang Hwang Gabriel C. Dworschak Friedhelm Hildebrandt 《Pediatric nephrology (Berlin, Germany)》2014,29(4):695-704
Congenital anomalies of the kidney and urinary tract (CAKUT) cover a wide range of structural malformations that result from defects in the morphogenesis of the kidney and/or urinary tract. These anomalies account for about 40–50 % of children with chronic kidney disease worldwide. Knowledge from genetically modified mouse models suggests that single gene mutations in renal developmental genes may lead to CAKUT in humans. However, until recently, only a handful of CAKUT-causing genes were reported, most of them in familial syndromic cases. Recent findings suggest that CAKUT may arise from mutations in a multitude of different single gene causes. We focus here on single-gene causes of CAKUT and their developmental origin. Currently, more than 20 monogenic CAKUT-causing genes have been identified. High-throughput sequencing techniques make it likely that additional CAKUT-causing genes will be identified in the near future. 相似文献
8.
Ankana Daga Amar J. Majmundar Daniela A. Braun Heon Yung Gee Jennifer A. Lawson Shirlee Shril Tilman Jobst-Schwan Asaf Vivante David Schapiro Weizhen Tan Jillian K. Warejko Eugen Widmeier Caleb P. Nelson Hanan M. Fathy Zoran Gucev Neveen A. Soliman Seema Hashmi Jan Halbritter Friedhelm Hildebrandt 《Kidney international》2018,93(1):204-213
9.
Optimal control strategy of SEIR endemic model with continuous age‐structure in the exposed and infectious classes 下载免费PDF全文
In this paper, we consider an endemic Susceptible‐Exposed‐Infectious‐Recovered model with continuous age‐structure for exposed and infectious classes. This work is appropriate for those infectious diseases that have exposed period such as tuberculosis and herpes virus infection. Key result is the existence of an optimal control problem. To control the spread of the disease, we use an objective functional with a suitable control and present an optimal control problem. Finally, we present some simulations that support our theoretical findings and show the effectiveness of the model. 相似文献