全文获取类型
| 收费全文 | 61223篇 |
| 免费 | 4364篇 |
| 国内免费 | 230篇 |
学科分类
| 医药卫生 | 65817篇 |
出版年
| 2023年 | 227篇 |
| 2022年 | 442篇 |
| 2021年 | 1046篇 |
| 2020年 | 589篇 |
| 2019年 | 990篇 |
| 2018年 | 1206篇 |
| 2017年 | 827篇 |
| 2016年 | 947篇 |
| 2015年 | 1043篇 |
| 2014年 | 1708篇 |
| 2013年 | 2537篇 |
| 2012年 | 3735篇 |
| 2011年 | 4057篇 |
| 2010年 | 2283篇 |
| 2009年 | 2087篇 |
| 2008年 | 3676篇 |
| 2007年 | 3839篇 |
| 2006年 | 3824篇 |
| 2005年 | 3914篇 |
| 2004年 | 3831篇 |
| 2003年 | 3501篇 |
| 2002年 | 3413篇 |
| 2001年 | 599篇 |
| 2000年 | 489篇 |
| 1999年 | 672篇 |
| 1998年 | 790篇 |
| 1997年 | 667篇 |
| 1996年 | 601篇 |
| 1995年 | 576篇 |
| 1994年 | 508篇 |
| 1993年 | 466篇 |
| 1992年 | 442篇 |
| 1991年 | 439篇 |
| 1990年 | 374篇 |
| 1989年 | 351篇 |
| 1988年 | 347篇 |
| 1987年 | 329篇 |
| 1986年 | 318篇 |
| 1985年 | 382篇 |
| 1984年 | 519篇 |
| 1983年 | 464篇 |
| 1982年 | 556篇 |
| 1981年 | 530篇 |
| 1980年 | 521篇 |
| 1979年 | 290篇 |
| 1978年 | 329篇 |
| 1977年 | 316篇 |
| 1976年 | 258篇 |
| 1975年 | 261篇 |
| 1974年 | 284篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
Hanna Lee Mary K. Tan Andrew T. Yan Paul Angaran Paul Dorian Claudia Bucci Jean C. Gregoire Alan D. Bell Martin S. Green Peter L. Gross Allan Skanes Charles R. Kerr L. Brent Mitchell Jafna L. Cox Vidal Essebag Brett Heilbron Krishnan Ramanathan Carl Fournier Shaun G. Goodman 《The Canadian journal of cardiology》2019,35(2):160-168
Background
Physicians treating nonvalvular atrial fibrillation (AF) assess stroke and bleeding risks when deciding on anticoagulation. The agreement between empirical and physician-estimated risks is unclear. Furthermore, the association between patient and physician sex and anticoagulation decision-making is uncertain.Methods
We pooled data from 2 national primary care physician chart audit databases of patients with AF (Facilitating Review and Education to Optimize Stroke Prevention in Atrial Fibrillation and Coordinated National Network to Engage Physicians in the Care and Treatment of Patients with Atrial Fibrillation Chart Audit) with a combined 1035 physicians (133 female, 902 male) and 10,927 patients (4567 female and 6360 male).Results
Male physicians underestimated stroke risk in female patients and overestimated risk in male patients. Female physicians estimated stroke risk well in female patients but underestimated the risk in male patients. Risk of bleeding was underestimated in all. Despite differences in risk assessment by physician and patient sex, > 90% of patients received anticoagulation across all subgroups. There was modest agreement between physician estimated and calculated (ie, CHADS2 score) stroke risk: Kappa scores were 0.41 (0.35-0.47) for female physicians and 0.34 (0.32-0.36) for male physicians.Conclusions
Our study is the first to examine the association between patient and physician sex influences and stroke and bleeding risk estimation in AF. Although there were differences in agreement between physician estimated stroke risk and calculated CHADS2 scores, these differences were small and unlikely to affect clinical practice; further, despite any perceived differences in the accuracy of risk assessment by sex, most patients received anticoagulation. 相似文献3.
4.
5.
6.
Setting goals to maintain hope. 总被引：3，自引：0，他引：3
7.
8.
9.
Internal eye wall resection in the management of uveal melanoma 总被引：3，自引：0，他引：3
G A Peyman H Charles 《Canadian journal of ophthalmology. Journal canadien d'ophtalmologie》1988,23(5):218-223
Twenty patients with presumed uveal melanoma underwent internal eye wall resection. It was the primary procedure in 13 patients who had tumours within 2 disc diameters of the optic nerve head and was combined with external resection in the remainder. Malignant melanoma was confirmed histologically in 15 patients; the diagnosis was a benign tumour in the other 5. The length of follow-up ranged from 2 to 37 (mean 19) months. In all cases the retina was completely attached at the time of last examination. The visual acuity ranged from 20/40 to hand movements; nine patients had an acuity of 20/400 or better. At the time of writing no metastatic disease or local recurrence had developed in any of the 15 patients in whom malignant melanoma was diagnosed. 相似文献
10.
