全文获取类型
收费全文 | 2178篇 |
免费 | 142篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 46篇 |
妇产科学 | 35篇 |
基础医学 | 233篇 |
口腔科学 | 45篇 |
临床医学 | 268篇 |
内科学 | 404篇 |
皮肤病学 | 45篇 |
神经病学 | 215篇 |
特种医学 | 125篇 |
外国民族医学 | 1篇 |
外科学 | 258篇 |
综合类 | 51篇 |
一般理论 | 1篇 |
预防医学 | 246篇 |
眼科学 | 11篇 |
药学 | 149篇 |
中国医学 | 22篇 |
肿瘤学 | 155篇 |
出版年
2022年 | 20篇 |
2021年 | 27篇 |
2020年 | 24篇 |
2019年 | 38篇 |
2018年 | 38篇 |
2017年 | 31篇 |
2016年 | 27篇 |
2015年 | 38篇 |
2014年 | 53篇 |
2013年 | 88篇 |
2012年 | 91篇 |
2011年 | 88篇 |
2010年 | 80篇 |
2009年 | 67篇 |
2008年 | 81篇 |
2007年 | 83篇 |
2006年 | 91篇 |
2005年 | 76篇 |
2004年 | 70篇 |
2003年 | 68篇 |
2002年 | 54篇 |
2001年 | 49篇 |
2000年 | 65篇 |
1999年 | 50篇 |
1998年 | 34篇 |
1997年 | 26篇 |
1996年 | 39篇 |
1995年 | 31篇 |
1994年 | 33篇 |
1993年 | 41篇 |
1992年 | 54篇 |
1991年 | 35篇 |
1990年 | 30篇 |
1989年 | 64篇 |
1988年 | 34篇 |
1987年 | 47篇 |
1986年 | 39篇 |
1985年 | 43篇 |
1984年 | 37篇 |
1983年 | 24篇 |
1982年 | 24篇 |
1981年 | 21篇 |
1980年 | 20篇 |
1979年 | 27篇 |
1978年 | 19篇 |
1977年 | 17篇 |
1976年 | 17篇 |
1975年 | 22篇 |
1974年 | 18篇 |
1973年 | 10篇 |
排序方式: 共有2322条查询结果,搜索用时 750 毫秒
1.
2.
3.
4.
Abdulbari BENER Omer F. EL‐RUFAIE Saadat KAMRAN Ana B. GEORGIEVSKI Abdulaziz FAROOQ Martin RYSAVY 《International journal of rheumatic diseases》2006,9(3):257-263
Objective: The aim of this study was to determine the prevalence of low back pain (LBP) in a primary care setting population and examine its association with the symptoms of depression and somatization. Methods: This is a cross‐sectional study, utilising a survey carried out in primary health care clinics (PHCs) in Al‐Ain, United Arab Emirates (UAE). A multistage stratified sampling design was used and a representative sample of 1304 UAE nationals aged 18–65 years who attended PHC clinics for any reason were included and 1103 (84.5%) subjects agreed to participate and responded to the questionnaire during a period from June 2001 to January 2002. A specially designed questionnaire with three parts was used for the data collection: socio‐demographic information of the studied subjects, modified version of the Roland‐Morris scale for evaluating back‐related functional disability and SCL‐90 R for depression and somatization subscales was used to assess depressive and somatic symptoms. Results: Of the total number of subjects surveyed (1103), 586 (53.1%) were men and 517 (46.9%) women. The mean age was 34.9 ± 13.4 years for men and 33.5 ± 11.8 years for women. The prevalence of LBP in the studied subjects was 64.7% (95% CI, 60.7–68.5] with 46.7% among men and 53.3% among women. There were a significant differences between the subjects with LBP and without LBP with respect to gender (P < 0.001), body mass index (BMI) (P < 0.001), occupational status (P < 0.001) and living environment (P = 0.016). Functional disability was higher in patients with LBP. Young patients in aged 15–34 years, patients with preparatory/secondary educational level and students showed higher depressive symptoms. A similar pattern was found in patients with somatic symptoms. Factor analysis revealed a strong association between depression and somatization in LBP patients. Conclusions: Functional disability was higher in with LBP. Furthermore, symptoms of depression and somatization are prevalent among LBP patients. 相似文献
5.
O. A. MIRGHANI† E. O. EL AMIN† M. E. S. ALI† H. S. OSMAN‡ B. HAMAD§ 《Medical education》1988,22(4):314-316
The community-based course presented is a longitudinal course running through four semesters in the Faculty of Medicine, University of Gezira, Sudan. Students combine their regular work in primary health care centres with attachments to a number of families in Wad Medani town. They continue to visit these families regularly throughout their entire medical course with the aim of studying them and helping them with some of their medical and psychosocial problems. 相似文献
6.
P Gustafson K Herrlin L Biling H Willén A Rydholm 《Acta radiologica (Stockholm, Sweden : 1987)》1992,33(5):474-476
Fifty-one patients with deep-seated soft tissue sarcoma of the extremities and trunk wall were examined with contrast-enhanced CT for presence of nonenhanced tumor areas (CT necrosis). After a median follow-up time of 3 years, 19 of the 41 patients with CT necrosis had developed metastases, compared to none of the 10 patients who had tumors without CT necrosis. Tumors with CT necrosis were larger than tumors without, but in tumors of similar size, absence of CT necrosis was a favorable prognostic sign. 相似文献
7.
Robert C Susil Kevin Camphausen Peter Choyke Elliot R McVeigh Gary S Gustafson Holly Ning Robert W Miller Ergin Atalar C Norman Coleman Cynthia Ménard 《Magnetic resonance in medicine》2004,52(3):683-687
A technique for transperineal high-dose-rate (HDR) prostate brachytherapy and needle biopsy in a standard 1.5 T MRI scanner is demonstrated. In each of eight procedures (in four patients with intermediate to high risk localized prostate cancer), four MRI-guided transperineal prostate biopsies were obtained followed by placement of 14-15 hollow transperineal catheters for HDR brachytherapy. Mean needle-placement accuracy was 2.1 mm, 95% of needle-placement errors were less than 4.0 mm, and the maximum needle-placement error was 4.4 mm. In addition to guiding the placement of biopsy needles and brachytherapy catheters, MR images were also used for brachytherapy treatment planning and optimization. Because 1.5 T MR images are directly acquired during the interventional procedure, dependence on deformable registration is reduced and online image quality is maximized. 相似文献
8.
9.
Abstract We previously demonstrated that cytomegalovirus (CMV) infection enhanced perivascular inflammation in rat aortic allografts. In this study, we investigated the relationship between the CMV infection load and the magnitude of perivasculitis (chronic rejection) in aortic transplants. Rats received or-thotopic abdominal aortic grafts, different degrees of total body irradiation (TBI) for immunosuppres-sion and CMV inoculation. The spleens of the rats receiving 5 Gy of TBI contained more infectious virus and viral antigens than those of rats receiving 3 Gy of TBI or no TBI. Although the number of inflammatory cells infiltrating the perivascular area was decreased after TBI, CMV infection resulted in increased perivasculitis in rats that received 5 Gy of TBI as compared to non-infected animals. This virus-induced effect was characterized predominantly by an increased T-cell infiltration, including CD4 and CD8 T-cells. It is concluded that an enhanced systemic CMV infection during severe immunosuppressive therapy can accelerate the development of chronic rejection, which seems to be mediated mainly by T-cells. 相似文献
10.
Familial Pick''s disease and dementia in frontal lobe degeneration of non-Alzheimer type are not variants of prion disease.
下载免费PDF全文
![点击此处可从《Journal of neurology, neurosurgery, and psychiatry》网站下载免费的PDF全文](/ch/ext_images/free.gif)