全文获取类型
收费全文 | 574篇 |
免费 | 40篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 5篇 |
妇产科学 | 11篇 |
基础医学 | 109篇 |
口腔科学 | 1篇 |
临床医学 | 57篇 |
内科学 | 124篇 |
皮肤病学 | 26篇 |
神经病学 | 73篇 |
特种医学 | 7篇 |
外科学 | 42篇 |
综合类 | 2篇 |
预防医学 | 44篇 |
眼科学 | 2篇 |
药学 | 31篇 |
中国医学 | 1篇 |
肿瘤学 | 72篇 |
出版年
2023年 | 3篇 |
2022年 | 5篇 |
2021年 | 22篇 |
2020年 | 15篇 |
2019年 | 15篇 |
2018年 | 14篇 |
2017年 | 16篇 |
2016年 | 22篇 |
2015年 | 23篇 |
2014年 | 25篇 |
2013年 | 32篇 |
2012年 | 38篇 |
2011年 | 36篇 |
2010年 | 19篇 |
2009年 | 27篇 |
2008年 | 37篇 |
2007年 | 41篇 |
2006年 | 26篇 |
2005年 | 29篇 |
2004年 | 27篇 |
2003年 | 36篇 |
2002年 | 38篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1998年 | 11篇 |
1997年 | 7篇 |
1996年 | 6篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 5篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1964年 | 1篇 |
排序方式: 共有615条查询结果,搜索用时 140 毫秒
81.
82.
83.
84.
Giulio Nicita Donata Villari Simone Caroassai Grisanti Michele Marzocco Vincenzo Li Marzi Alberto Martini 《European urology》2017,71(1):133-138
Background
Rectourethral fistulas (RUFs) represent an uncommon complication of pelvic surgery, especially radical prostatectomy. To date there is no standardised treatment for managing RUFs. This represents a challenge for surgeons, mainly because of the potential recurrence risk.Objective
To describe our minimally invasive transanal repair (MITAR) of RUFs and to assess its safety and outcomes.Design, setting, and participants
We retrospectively evaluated 12 patients who underwent MITAR of RUF at our centre from October 2008 to December 2014. Exclusion criteria were a fistula diameter greater than 1.5 cm, sepsis, and/or faecaluria.Surgical procedure
After fistula identification through cystoscopy and 5F-catheter positioning within the fistula, MITAR is performed using laparoscopic instruments introduced through Parks’ anal retractor. The fibrotic margins of the fistula are carefully dissected by a lozenge incision of the rectal wall, parallel to the rectal axis. Under the healthy flap of the rectal wall the urothelium is located and the fistulous tract is sutured with interrupted stitches. After a leakage test of the bladder, the rectal wall is sutured with interrupted stitches. Electrocoagulation is never used during this procedure.Measurements
Fistula closure, postoperative complications, and recurrence.Results and limitations
Median follow-up was 21 (range, 12–74) mo. Median operative time was 58 (range, 50–70) min. Median hospital stay was 1.5 (range, 1–4) d. Early surgical complications occurred in one patient (8.3%). Recurrence did not occur in any of the cases. Limitations included retrospective analysis, small case load, and lack of experience with radiation-induced fustulas.Conclusions
MITAR is a safe, effective, and reproducible procedure. Its advantages are low morbidity and quick recovery, and no need for a colostomy.Patient summary
We studied the treatment of rectourethral fistulas. Our technique, transanally performed using laparoscopic instruments, was found to be safe, feasible, and effective, with limited risk of complications. 相似文献85.
86.
Azathioprine is an immunosuppressive and steroid-sparing purine analogue, used in the treatment of several autoimmune diseases. In multiple sclerosis, available evidence suggests that oral azathioprine reduces relapse rates, provides a slight benefit on disability, and reduces new inflammatory lesions. Here, we focus on molecular mechanisms of Azathioprine and on its usefulness in multiple sclerosis. 相似文献
87.
Rationale Nociceptin/orphanin FQ (N/OFQ) has been proposed to be a functional antagonist of corticotropin-releasing factor (CRF) in
relation to its anti-stress action and its ability to antagonize the anorectic effect of CRF in rats without exhibiting affinity
for CRF receptors. The bed nucleus of the stria terminalis (BST) is highly sensitive to the inhibitory effect of N/OFQ on
CRF-induced anorexia.
Objective The present study was aimed at further evaluating the role of the BST in the functional antagonism between N/OFQ and CRF by
examining it at molecular level and in the context of CRF-induced anxiety in the rat.
Materials and methods First, in situ hybridization experiments investigated the expression of the pro-N/OFQ precursor and of NOP receptors in several
brain areas 6 h after injection of CRF (0.2 and 1 μg/rat) into the lateral cerebroventricle (LV). Second, the elevated plus
maze test was used to evaluate whether N/OFQ, injected into the BST (0.05 and 0.5 μg/rat) or into the LV (0.5, 1.8, and 2.4 μg/rat),
inhibits the anxiogenic-like effect evoked by LV injection of CRF (1 μg/rat) in rats.
Results The in situ hybridization study showed that LV injection of CRF 1 μg/rat increases NOP receptor expression in the BST, while
no change of the N/OFQ precursor was observed. On the other hand, N/OFQ injection into the BST blocks the anxiogenic effect
of CRF at doses lower than those required by LV injection (0.5 vs 1.8 μg/rat, respectively).
Conclusion These data provide further support for the hypothesis that N/OFQ may behave as functional antagonist of CRF and suggest that
this antagonism may occur within the BST. 相似文献
88.
Maria Cotelli Rosa Manenti Donata Paternicò Maura Cosseddu Michela Brambilla Michela Petesi Enrico Premi Roberto Gasparotti Orazio Zanetti Alessandro Padovani Barbara Borroni 《Brain topography》2016,29(5):738-751
Agrammatic variant primary progressive aphasia is a neurodegenerative disorder specifically characterized by language deficits. A recent study has demonstrated a beneficial effect of transcranial direct current stimulation (tDCS) in combination with language training on naming accuracy in these patients. The aim of the study was to evaluate whether the improvement of naming accuracy after tDCS during language training was related to regional grey matter (GM) density. Eighteen avPPA patients underwent a brain magnetic resonance imaging before receiving a treatment that consisted of tDCS over the left dorsolateral prefrontal cortex during individualized language training (10 daily therapy sessions, 5 days per week from Monday to Friday). Performances on neuropsychological tests and naming of objects (treated and untreated) and actions were assessed at baseline, post-treatment and 3 months after treatment. Correlations between individual changes after treatment on neuropsychological tests and on picture naming task and voxel-based GM volume at baseline were performed. We found that the improvement in the naming of treated objects was positively correlated with GM volume in the left fusiform, left middle temporal, and right inferior temporal gyri whereas action naming change was related to GM density in the left middle temporal gyrus. In conclusion baseline density of GM in these brain regions was associated with greater treatment response on naming performances, suggesting that intervention in early disease stages might be most successful. These findings have implication for designing future rehabilitation protocols in language variants of frontotemporal dementia. 相似文献
89.
Piero Dalerba Axel Ricci Vincenzo Russo Donata Rigatti Maria Rita Nicotra Marcella Mottolese Claudio Bordignon Pier Giorgio Natali Catia Traversari 《International journal of cancer. Journal international du cancer》1998,77(2):200-204
Human melanoma cells express several antigens which are recognized by autologous and specific CTL clones in association with HLA-class-I molecules. Many of these antigens represent suitable targets for tumor immunotherapy, since their expression in human melanoma cells is common and highly specific. In order to achieve real clinical success with therapeutic vaccination strategies, one important requirement is the expression of the target antigen by all the tumor lesions of a patient. We have studied this issue by assessing, through an RT-PCR approach, the expression of MAGE-1, MAGE-2, MAGE-3, BAGE, GAGE-1/2, Tyrosinase and Melan-A/MART-1 genes in 17 clusters of simultaneous in-transit or regional lymph-node metastases collected from 15 stage-III and 1 stage-IV (AJCC/UICC pTNM system) melanoma patients. In 14 out of 17 clusters of simultaneous metastatic lesions (82%), the homogeneity in the pattern of gene expression within the cluster was complete. Heterogeneity within the same cluster was observed in only 3 out of 17 clusters (18%) and represented only minor features. Our data reveal that, in AJCC-stage-III melanoma patients, different but simultaneous metastatic lesions express the same pattern of antigen-coding genes. These observations have 2 main clinical implications: (i) the antigenic characterization of one single and easily accessible lesion allows identification of optimal targets for an active antigen-specific immunotherapy treatment; (ii) almost all the metastatic lesions are expected to be hit by the immune response eventually induced against the tumor antigen. Moreover, these data suggest that active specific immunotherapy directed against MAGE-1, MAGE-3, BAGE, GAGE-1/2, Melan-A/MART-1 and Tyrosinase antigens could be exploited as an adjuvant treatment to surgery in high-risk AJCC-stage-III-melanoma patients. Int. J. Cancer 77:200–204, 1998.© 1998 Wiley-Liss, Inc. 相似文献
90.