全文获取类型
收费全文 | 1349404篇 |
免费 | 95804篇 |
国内免费 | 2142篇 |
专业分类
耳鼻咽喉 | 19345篇 |
儿科学 | 44493篇 |
妇产科学 | 39708篇 |
基础医学 | 196654篇 |
口腔科学 | 37455篇 |
临床医学 | 112798篇 |
内科学 | 267990篇 |
皮肤病学 | 28665篇 |
神经病学 | 105030篇 |
特种医学 | 51538篇 |
外国民族医学 | 367篇 |
外科学 | 206185篇 |
综合类 | 26873篇 |
现状与发展 | 1篇 |
一般理论 | 322篇 |
预防医学 | 100912篇 |
眼科学 | 30887篇 |
药学 | 103255篇 |
19篇 | |
中国医学 | 2707篇 |
肿瘤学 | 72146篇 |
出版年
2018年 | 14326篇 |
2016年 | 11495篇 |
2015年 | 13253篇 |
2014年 | 17741篇 |
2013年 | 27210篇 |
2012年 | 38379篇 |
2011年 | 40881篇 |
2010年 | 23710篇 |
2009年 | 21801篇 |
2008年 | 39022篇 |
2007年 | 42183篇 |
2006年 | 42625篇 |
2005年 | 41950篇 |
2004年 | 40165篇 |
2003年 | 38890篇 |
2002年 | 38307篇 |
2001年 | 60067篇 |
2000年 | 61773篇 |
1999年 | 52394篇 |
1998年 | 14566篇 |
1997年 | 13017篇 |
1996年 | 13285篇 |
1995年 | 12498篇 |
1994年 | 11877篇 |
1993年 | 10963篇 |
1992年 | 41820篇 |
1991年 | 41059篇 |
1990年 | 40586篇 |
1989年 | 39343篇 |
1988年 | 36677篇 |
1987年 | 35920篇 |
1986年 | 34261篇 |
1985年 | 32641篇 |
1984年 | 24303篇 |
1983年 | 21102篇 |
1982年 | 12532篇 |
1981年 | 11066篇 |
1979年 | 23054篇 |
1978年 | 16123篇 |
1977年 | 13936篇 |
1976年 | 13199篇 |
1975年 | 14454篇 |
1974年 | 17041篇 |
1973年 | 16417篇 |
1972年 | 15617篇 |
1971年 | 14506篇 |
1970年 | 13546篇 |
1969年 | 13041篇 |
1968年 | 12265篇 |
1967年 | 10719篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
Moisés Rodríguez-Mañero Estrella López-Pardo Alberto Cordero-Fort Jose Luis Martínez-Sande Carlos Peña-Gil José Novo Platas Javier García-Seara Pilar Mazón Alfonso Varela-Román Jose María García-Acuña José Ramón González-Juanatey 《Revista portuguesa de cardiologia》2019,38(1):21-29
Introduction
Today's healthcare policies rely heavily on data that has been gathered from multiple small studies in intrinsically varied populations. We sought to describe the prevalence, comorbidities and outcomes of atrial fibrillation (AF) in the population of a specific region where all healthcare centers have implemented a common information technology (IT) structure.Methods
The total number of inhabitants was obtained from the healthcare area's IT system. Information pertaining to AF was derived from various datasets in the data warehouse of the Galician regional health service.Results
In the healthcare area of Santiago de Compostela (n=383 000), the diagnosis of AF was coded in 7990 (2.08%) individuals in 2013. Mean age was 76.83±10.5 years, mean CHA2DS2-VASc score was 3.5, 4056 (50.8%) were female and 72.6% were receiving oral anticoagulants. Up until December 31, 2015, 1361 patients died from all causes (17%), 478 (6%) of them in-hospital, with 30 deaths secondary to intracranial bleeding (0.4%) and 125 to stroke (1.6%). On multivariate analysis, age, gender, heart failure, diabetes, previous thromboembolic events and dementia were independently associated with all-cause mortality. Similarly, age, gender and previous thromboembolic events were associated with future thromboembolic events. Oral anticoagulation was found to be protective against mortality and thromboembolic events.Conclusions
In this study, we report for the first time the true prevalence of diagnosed AF and its clinical characteristics, treatment and prognosis in a Spanish healthcare area, based on the systematic integration of data available from a universally adopted health IT system within the region. 相似文献22.
S. Kim M.J. Graham R.G. Lee L. Yang S. Kim V. Subramanian J.D. Layne L. Cai R.E. Temel D. Shih A.J. Lusis J.A. Berliner S. Lee 《Nutrition, metabolism, and cardiovascular diseases : NMCD》2019,29(3):306-315
Background and aims
Heparin-binding EGF-like growth factor (HB-EGF) is a representative EGF family member that interacts with EGFR under diverse stress environment. Previously, we reported that the HB-EGF-targeting using antisense oligonucleotide (ASO) effectively suppressed an aortic aneurysm in the vessel wall and circulatory lipid levels. In this study, we further examined the effects of the HB-EGF ASO administration on the development of hyperlipidemia-associated atherosclerosis using an atherogenic mouse model.Methods and results
The male and female LDLR deficient mice under Western diet containing 21% fat and 0.2% cholesterol content were cotreated with control and HB-EGF ASOs for 12 weeks. We observed that the HB-EGF ASO administration effectively downregulated circulatory VLDL- and LDL-associated lipid levels in circulation; concordantly, the HB-EGF targeting effectively suppressed the development of atherosclerosis in the aorta. An EGFR blocker BIBX1382 administration suppressed the hepatic TG secretion rate, suggesting a positive role of the HB-EGF signaling for the hepatic VLDL production. We newly observed that there was a significant improvement of the insulin sensitivity by the HB-EGF ASO administration in a mouse model under the Western diet as demonstrated by the improvement of the glucose and insulin tolerances.Conclusion
The HB-EGF ASO administration effectively downregulated circulatory lipid levels by suppressing hepatic VLDL production rate, which leads to effective protection against atherosclerosis in the vascular wall. 相似文献23.
M. Iachina P.M. Ljungdalh R.G. Sørensen L. Kaerlev J. Blaakær O. Trosko N. Qvist B.M. Nørgård 《Clinical oncology (Royal College of Radiologists (Great Britain))》2019,31(2):115-123
Aims
To examine the influence of pre-existing psychiatric disorder on the choice of treatment in patients with gynaecological cancer.Materials and methods
The analyses were based on all patients who underwent surgical treatment for endometrial, ovarian or cervical cancer who were registered in the Danish Gynecological Cancer Database in the years 2007–2014 (3059 patients with ovarian cancer, 5100 patients with endometrial cancer and 1150 with cervical cancer). Logistic regression model and Cox regression model, adjusted for relevant confounders, were used to estimate the effect of pre-existing psychiatric disorder on the course of cancer treatment. Our outcomes were (i) presurgical oncological treatment, (ii) macroradical surgery for patients with ovarian cancer, (iii) radiation/chemotherapy within 30 days and 100 days after surgery and (iv) time from surgery to first oncological treatment.Results
In the group of patients with ovarian cancer, more patients with a psychiatric disorder received macroradical surgery versus patients without a psychiatric disorder, corresponding to an adjusted odds ratio of 1.24 (95% confidence interval 0.62–2.41) and the chance for having oncological treatment within 100 days was odds ratio = 1.26 (95% confidence interval 0.77–2.10). As for patients with endometrial cancer, all outcome estimates were close to unity. The adjusted odds ratio for oncological treatment within 30 days after surgery in patients with cervical cancer with a history of psychiatric disorder was 0.20 (95% confidence interval 0.03–1.54).Conclusions
We did not find any significant differences in the treatment of ovarian and endometrial cancer in patients with pre-existing psychiatric diagnoses. When it comes to oncological treatment, we suggest that increased attention should be paid to patients with cervical cancer having a pre-existing psychiatric diagnosis. 相似文献24.
25.
Jaime L. Clark Carla G. Taylor Peter Zahradka 《Nutrition, metabolism, and cardiovascular diseases : NMCD》2021,31(1):216-226
Background and aimsConsuming pulses (dry beans, dry peas, chickpeas, lentils) over several weeks can improve vascular function and decrease cardiovascular disease risk; however, it is unknown whether pulses can modulate postprandial vascular responses. The objective of this study was to compare different bean varieties (black, navy, pinto, red kidney) and white rice for their acute postprandial effects on vascular and metabolic responses in healthy individuals.Methods and resultsThe study was designed as a single-blinded, randomized crossover trial with a minimum 6 days between consumption of the food articles. Vascular tone (primary endpoint), haemodynamics and serum biochemistry (secondary endpoints) were measured in 8 healthy adults before and at 1, 2, and 6 h after eating ¾ cup of beans or rice. Blood pressure and pulse wave velocity (PWV) were lower at 2 h following red kidney bean and pinto bean consumption compared to rice and navy bean, respectively (p < 0.05). There was greater vasorelaxation 6 h following consumption of darker-coloured beans, as shown by decreased vascular tone: PWV was lower after consuming black bean compared to pinto bean, augmentation pressure was lower after consuming black bean compared to rice and pinto bean, and wave reflection magnitude was lower after consuming red kidney bean and black bean compared to rice, navy bean, and pinto bean (p < 0.05). LDL-cholesterol concentrations were lower 6 h after black bean consumption compared to rice (p < 0.05).ConclusionOverall, red kidney and black beans, the darker-coloured beans, elicited a positive effect on the tensile properties of blood vessels, and this acute response may provide insight for how pulses modify vascular function. 相似文献
26.
Luke Boulter Esme Bullock Zeanap Mabruk Valerie G. Brunton 《British journal of cancer》2021,124(1):27
Although substantial progress has been made over the past 40 years in treating patients with cancer, effective therapies for those who are diagnosed with advanced metastatic disease are still few and far between. Cancer cells do not exist in isolation: rather, they exist within a complex microenvironment composed of stromal cells and extracellular matrix. Within this tumour microenvironment exists an interplay between the two main stromal cell subtypes, cancer-associated fibroblasts (CAFs) and immune cells, that are important in controlling metastasis. A complex network of paracrine signalling pathways between CAFs, immune cells and tumour cells are involved at multiple stages of the metastatic process, from invasion and intravasation at the primary tumour site to extravasation and colonisation in the metastatic site. Heterogeneity and plasticity within stromal cell populations also contribute to the complexity. Although many of these processes are likely to be common to a number of metastatic sites, we will describe in detail the interplay within the liver, a preferred site of metastasis for many tumours. A greater understanding of these networks provides opportunities for the design of new therapeutic approaches for targeting the metastatic disease.Subject terms: Cancer microenvironment, Mechanisms of disease 相似文献
27.
Yağmur Seda Yeşiltaş Gökçen Özcan Sibel Demirel Nilüfer Yalçındağ 《Ocular immunology and inflammation》2020,28(2):178-181
ABSTRACTPurpose: To report a case of Candida albicans endogenous endophthalmitis in an immunocompetent patient with onychomycosis.Methods: Retrospective case report.Results: A 40-year-old man with onychomycosis presented with C. albicans subretinal abscess in the left eye. Systemic and intravitreal injections did not prevent further progression of the infection. The patient underwent pars plana vitrectomy. One month after surgery, the intraocular inflammation gradually subsided. However, his visual acuity stayed at counting fingers as a result of macular scarring.Conclusion: The aim of this case presentation is to emphasize that endogenous fungal endophthalmitis can be seen in an immunocompetent patient. The use of systemic steroids in the past was the main reason for the progression of the disease in this case. In these situations, when the clinical findings suggest a fungal etiology, it should keep in mind that endogenous candida endophthalmitis can be a result of fungal infections from distant sites such as the toenails and systemic steroids should not be started before definite diagnosis. 相似文献
28.
Büşra Başar Gökcen Yasemin Akdevelioğlu Sultan Canan Nuray Bozkurt 《Gynecological endocrinology》2020,36(9):764-767
AbstractData on eating disorders in women with PCOS is insufficient. The objective of this case study was to examine the hypothesis that women with PCOS exhibit more impaired eating than healthy women. Women diagnosed with PCOS under the 2003 Rotterdam Diagnostic Criteria (n?=?40) were compared with a healthy control group (n?=?40). The groups also were divided into two as normal body weight and overweight/obese. The Eating Disorders Assessment Questionnaire (EDE-Q) and the Three Factor Eating Questionnaire (TFEQ-R21), were completed by all participants in order to evaluate eating behaviors in addition to eating disorders. Among the overweight/obese group, the average total and subscale scores of the EDE-Q as well as the total and sub-factor scores of the TFEQ-R21 were higher in women with PCOS compared to controls (p?<?.05). However, this statistically significant result was not shown among the women with normal weight (p?>?.05). In comparison to the controls, the PCOS women displayed higher values of the tool scores indicating abnormal restraint eating, body shape concern and weight concern subscale scores (p?<?.05). This result suggests that the evaluation of eating disorders should be added to routine screening and the monitoring of women with PCOS. 相似文献
29.
Testing association of rare genetic variants with resistance to three common antiseizure medications
Stefan Wolking Claudia Moreau Anne T. Nies Elke Schaeffeler Mark McCormack Pauls Auce Andreja Avbersek Felicitas Becker Martin Krenn Rikke S. Møller Marina Nikanorova Yvonne G. Weber Sarah Weckhuysen Gianpiero L. Cavalleri Norman Delanty Chantal Depondt Michael R. Johnson Bobby P.C. Koeleman Wolfram S. Kunz Anthony G. Marson Josemir W. Sander Graeme J. Sills Pasquale Striano Federico Zara Fritz Zimprich Matthias Schwab Roland Krause Sanjay M. Sisodiya Patrick Cossette Simon L. Girard Holger Lerche EpiPGX Consortium 《Epilepsia》2020,61(4):657-666
30.
R.J. van de Peppel M.T. van der Beek L.G. Visser M.G.J. de Boer J. Wallinga 《International journal of antimicrobial agents》2019,53(3):284-293