收费全文 | 17448篇 |
免费 | 513篇 |
国内免费 | 48篇 |
耳鼻咽喉 | 542篇 |
儿科学 | 1560篇 |
妇产科学 | 593篇 |
基础医学 | 1039篇 |
口腔科学 | 1045篇 |
临床医学 | 1241篇 |
内科学 | 3073篇 |
皮肤病学 | 463篇 |
神经病学 | 1021篇 |
特种医学 | 844篇 |
外科学 | 3751篇 |
综合类 | 358篇 |
一般理论 | 7篇 |
预防医学 | 508篇 |
眼科学 | 546篇 |
药学 | 889篇 |
中国医学 | 97篇 |
肿瘤学 | 432篇 |
2024年 | 88篇 |
2023年 | 192篇 |
2022年 | 205篇 |
2021年 | 357篇 |
2020年 | 271篇 |
2019年 | 319篇 |
2018年 | 457篇 |
2017年 | 405篇 |
2016年 | 488篇 |
2015年 | 435篇 |
2014年 | 614篇 |
2013年 | 848篇 |
2012年 | 993篇 |
2011年 | 1024篇 |
2010年 | 580篇 |
2009年 | 418篇 |
2008年 | 872篇 |
2007年 | 979篇 |
2006年 | 1007篇 |
2005年 | 1045篇 |
2004年 | 1100篇 |
2003年 | 1037篇 |
2002年 | 1002篇 |
2001年 | 679篇 |
2000年 | 594篇 |
1999年 | 514篇 |
1998年 | 191篇 |
1997年 | 182篇 |
1996年 | 172篇 |
1995年 | 82篇 |
1994年 | 79篇 |
1993年 | 53篇 |
1992年 | 101篇 |
1991年 | 85篇 |
1990年 | 73篇 |
1989年 | 89篇 |
1988年 | 45篇 |
1987年 | 40篇 |
1986年 | 44篇 |
1985年 | 42篇 |
1984年 | 32篇 |
1983年 | 14篇 |
1981年 | 15篇 |
1980年 | 11篇 |
1979年 | 13篇 |
1978年 | 12篇 |
1977年 | 15篇 |
1976年 | 11篇 |
1972年 | 11篇 |
1966年 | 8篇 |
Purpose
Cardiovascular disease (CVD) due to atherosclerosis is the leading cause of early mortality and morbidity. The current European guidelines on CVD prevention in clinical practice recommend the use of the Systematic Coronary Risk Estimation (SCORE) system. The current American Heart Association guidelines recommend the use of the new pooled cohort risk assessment equations to estimate the 10-year atherosclerotic CVD risk. The purpose of this article was to investigate the compliance of dyslipidemia guidelines in daily practice in patients with dyslipidemia or who have risk factors for CVD.Methods
The study group consisted of 500 outpatients who had dyslipidemia or risk factors for CVD. The risk level was computed according to the European and American Heart Association guidelines. Therapeutic LDL-C targets were identified based on the calculated risk level. Therapeutic target levels were compared based on the dosage of statins used and achievement of the LDL-C goal in daily practice according to the risk levels.Findings
According to the European dyslipidemia guidelines, 231 patients were in the very-high/high-risk group, and 106 patients (45.9%) achieved the LDL-C target (<100 mg/dL); 210 patients were in the moderate-risk group, and 156 (74.3%) patients achieved the LDL-C target (<115 mg/dL); and 59 patients were in the low-risk group, and 55 (93.2%) patients achieved the LDL-C target (<155 mg/dL). Univariate and multivariate logistic regression analyses revealed that the LDL-C level and presence of coronary artery disease were significantly reverse associated with achievement of the LDL-C goal (both, P < 0.001).Implications
Our results showed that the majority of patients were in the very-high/high-risk group in daily practice. Although the European dyslipidemia guidelines are more likely to be used in daily practice, achievement of the guidelines-recommended treatment goals was low. 相似文献African monkeys are resistant to HIV-1 infection due to intrinsic restriction mechanisms found in their cells. However, although they can be infected by monkey-adapted modified HIV-1 particles that are designed to overcome known restriction factors, virus numbers drop to undetectable levels in immunocompetent animals. These results indicate the possibility of the presence of yet unidentified factor(s) that restrict HIV-1 in old-world monkey (OWM) cells after integration of the viral genome into the host cell chromosome. In the light of these findings, we hypothesized that OWMs might have evolved resistance mechanism(s) against HIV-1 by switching specific gene(s) on in response to the synthesis of viral proteins in infected cells. In an attempt to mimic post-infection status, we expressed HIV-1 Tat gene in African green monkey cells and compared the whole proteome with normal cells and identified secretory leukocyte protease inhibitor (SLPI), a protein with known extracellular anti-HIV-1 activity, as an over-expressed protein in the presence of HIV-1 Tat protein by 2D-PAGE and mass spectrometry analysis. We also showed that overexpression of SLPI in the presence of HIV-1 Tat was specific to monkey cells. Our results also suggest that SLPI had a previously undiscovered intracellular anti-HIV activity in addition to its extracellular activity.
相似文献