全文获取类型
收费全文 | 6091篇 |
免费 | 322篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 126篇 |
儿科学 | 351篇 |
妇产科学 | 129篇 |
基础医学 | 593篇 |
口腔科学 | 81篇 |
临床医学 | 340篇 |
内科学 | 1176篇 |
皮肤病学 | 114篇 |
神经病学 | 463篇 |
特种医学 | 182篇 |
外科学 | 944篇 |
综合类 | 281篇 |
一般理论 | 2篇 |
预防医学 | 351篇 |
眼科学 | 272篇 |
药学 | 455篇 |
中国医学 | 18篇 |
肿瘤学 | 543篇 |
出版年
2023年 | 31篇 |
2022年 | 82篇 |
2021年 | 155篇 |
2020年 | 77篇 |
2019年 | 114篇 |
2018年 | 139篇 |
2017年 | 99篇 |
2016年 | 142篇 |
2015年 | 117篇 |
2014年 | 215篇 |
2013年 | 278篇 |
2012年 | 375篇 |
2011年 | 424篇 |
2010年 | 248篇 |
2009年 | 223篇 |
2008年 | 307篇 |
2007年 | 359篇 |
2006年 | 354篇 |
2005年 | 284篇 |
2004年 | 277篇 |
2003年 | 243篇 |
2002年 | 184篇 |
2001年 | 137篇 |
2000年 | 161篇 |
1999年 | 137篇 |
1998年 | 52篇 |
1997年 | 48篇 |
1996年 | 46篇 |
1995年 | 34篇 |
1993年 | 29篇 |
1992年 | 62篇 |
1991年 | 49篇 |
1990年 | 46篇 |
1989年 | 53篇 |
1988年 | 44篇 |
1987年 | 61篇 |
1986年 | 48篇 |
1985年 | 56篇 |
1984年 | 52篇 |
1983年 | 34篇 |
1979年 | 26篇 |
1978年 | 29篇 |
1977年 | 30篇 |
1974年 | 34篇 |
1973年 | 49篇 |
1972年 | 42篇 |
1971年 | 37篇 |
1970年 | 30篇 |
1969年 | 35篇 |
1968年 | 36篇 |
排序方式: 共有6421条查询结果,搜索用时 0 毫秒
101.
Stefan Zeuzem Thomas Berg Edward Gane Peter Ferenci Graham R. Foster Michael W. Fried Christophe Hezode Gideon M. Hirschfield Ira Jacobson Igor Nikitin Paul J. Pockros Fred Poordad Jane Scott Oliver Lenz Monika Peeters Vanitha Sekar Goedele De Smedt Rekha Sinha Maria Beumont-Mauviel 《Gastroenterology》2014
102.
103.
104.
105.
106.
107.
Anjan VY Loftus TM Burke MA Akhter N Fonarow GC Gheorghiade M Shah SJ 《The American journal of cardiology》2012,110(6):870-876
B-type natriuretic peptide (BNP) is used widely to exclude heart failure (HF) in patients with dyspnea. However, most studies of BNP have focused on diagnosing HF with reduced ejection fraction (EF). The aim of this study was to test the hypothesis that a normal BNP level (≤100 pg/ml) is relatively common in HF with preserved EF (HFpEF), a heterogenous disorder commonly associated with obesity. A total of 159 consecutive patients enrolled in the Northwestern University HFpEF Program were prospectively studied. All subjects had symptomatic HF with EF >50% and elevated pulmonary capillary wedge pressure. BNP was tested at baseline in all subjects. Clinical characteristics, echocardiographic parameters, invasive hemodynamics, and outcomes were compared among patients with HFpEF with normal (≤100 pg/ml) versus elevated (>100 pg/ml) BNP. Of the 159 patients with HFpEF, 46 (29%) had BNP ≤100 pg/ml. Subjects with normal BNP were younger, were more often women, had higher rates of obesity and higher body mass index, and less commonly had chronic kidney disease and atrial fibrillation. EFs and pulmonary capillary wedge pressures were similar in the normal and elevated BNP groups (62 ± 7% vs 61 ± 7%, p = 0.67, and 25 ± 8 vs 27 ± 9 mm Hg, p = 0.42, respectively). Elevated BNP was associated with enlarged left atrial volume, worse diastolic function, abnormal right ventricular structure and function, and worse outcomes (e.g., adjusted hazard ratio for HF hospitalization 4.0, 95% confidence interval 1.6 to 9.7, p = 0.003). In conclusion, normal BNP levels were present in 29% of symptomatic outpatients with HFpEF who had elevated pulmonary capillary wedge pressures, and although BNP is useful as a prognostic marker in HFpEF, normal BNP does not exclude the outpatient diagnosis of HFpEF. 相似文献
108.
Watson L Leone V Pilkington C Tullus K Rangaraj S McDonagh JE Gardner-Medwin J Wilkinson N Riley P Tizard J Armon K Sinha MD Ioannou Y Archer N Bailey K Davidson J Baildam EM Cleary G McCann LJ Beresford MW;UK Juvenile-Onset Systemic Lupus Erythematosus Study Group 《Arthritis and rheumatism》2012,64(7):2356-2365
109.
110.