全文获取类型
收费全文 | 208021篇 |
免费 | 11770篇 |
国内免费 | 670篇 |
专业分类
耳鼻咽喉 | 2575篇 |
儿科学 | 6272篇 |
妇产科学 | 4371篇 |
基础医学 | 27998篇 |
口腔科学 | 8695篇 |
临床医学 | 15276篇 |
内科学 | 48349篇 |
皮肤病学 | 5472篇 |
神经病学 | 17352篇 |
特种医学 | 5985篇 |
外国民族医学 | 26篇 |
外科学 | 26366篇 |
综合类 | 1604篇 |
现状与发展 | 1篇 |
一般理论 | 71篇 |
预防医学 | 20748篇 |
眼科学 | 3991篇 |
药学 | 12544篇 |
中国医学 | 814篇 |
肿瘤学 | 11951篇 |
出版年
2023年 | 1173篇 |
2022年 | 2569篇 |
2021年 | 4969篇 |
2020年 | 3089篇 |
2019年 | 4593篇 |
2018年 | 6228篇 |
2017年 | 4476篇 |
2016年 | 4228篇 |
2015年 | 4974篇 |
2014年 | 6939篇 |
2013年 | 8633篇 |
2012年 | 13638篇 |
2011年 | 14223篇 |
2010年 | 7212篇 |
2009年 | 6566篇 |
2008年 | 10928篇 |
2007年 | 11649篇 |
2006年 | 10818篇 |
2005年 | 10956篇 |
2004年 | 10263篇 |
2003年 | 9278篇 |
2002年 | 7290篇 |
2001年 | 5308篇 |
2000年 | 5261篇 |
1999年 | 4683篇 |
1998年 | 1829篇 |
1997年 | 1556篇 |
1996年 | 1466篇 |
1995年 | 1236篇 |
1994年 | 1225篇 |
1993年 | 1116篇 |
1992年 | 2827篇 |
1991年 | 2752篇 |
1990年 | 2491篇 |
1989年 | 2451篇 |
1988年 | 2225篇 |
1987年 | 2064篇 |
1986年 | 1935篇 |
1985年 | 1853篇 |
1984年 | 1351篇 |
1983年 | 1092篇 |
1982年 | 639篇 |
1981年 | 582篇 |
1980年 | 534篇 |
1979年 | 980篇 |
1978年 | 649篇 |
1975年 | 586篇 |
1974年 | 592篇 |
1973年 | 602篇 |
1972年 | 509篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Jose M. Morales Jose Angel Martinez-Flores Manuel Serrano Maria José Castro Francisco Javier Alfaro Florencio García Miguel Angel Martínez Amado Andrés Esther González Manuel Praga Estela Paz-Artal Antonio Serrano 《Journal of the American Society of Nephrology : JASN》2015,26(3):735-745
In the current immunosuppressive therapy era, vessel thrombosis is the most common cause of early graft loss after renal transplantation. The prevalence of IgA anti–β2-glycoprotein I antibodies (IgA-aB2GPI-ab) in patients on dialysis is elevated (>30%), and these antibodies correlate with mortality and cardiovascular morbidity. To evaluate the effect of IgA-aB2GPI-ab in patients with transplants, we followed all patients transplanted from 2000 to 2002 in the Hospital 12 de Octubre prospectively for 10 years. Presence of IgA-aB2GPI-ab in pretransplant serum was examined retrospectively. Of 269 patients, 89 patients were positive for IgA-aB2GPI-ab (33%; group 1), and the remaining patients were negative (67%; group 2). Graft loss at 6 months post-transplant was significantly higher in group 1 (10 of 89 versus 3 of 180 patients in group 2; P=0.002). The most frequent cause of graft loss was thrombosis of the vessels, which was observed only in group 1 (8 of 10 versus 0 of 3 patients in group 2; P=0.04). Multivariate analysis showed that the presence of IgA-aB2GPI-ab was an independent risk factor for early graft loss (P=0.04) and delayed graft function (P=0.04). There were no significant differences regarding patient survival between the two groups. Graft survival was similar in both groups after 6 months. In conclusion, patients with pretransplant IgA-aB2GPI-ab have a high risk of early graft loss caused by thrombosis and a high risk of delayed graft function. Therefore, pretransplant IgA-aB2GPI-ab may have a detrimental effect on early clinical outcomes after renal transplantation. 相似文献
4.
5.
6.
7.
8.
Moises Rodriguez-Gonzalez Antonio Moruno Tirado Reza Hosseinpour Jose Santos de Soto 《Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital》2015,42(4):350-356
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital condition. It responds well to early diagnosis and treatment, but otherwise the prognosis is poor. We present our case series of 12 patients (mean age, 2 ± 2.58 yr; age range, 2 mo–8 yr), emphasizing the diagnostic process and discussing our surgical results. The diagnosis of ALCAPA should be suspected in infants who have dilated cardiomyopathy with electrocardiographic changes that suggest ischemia, and in older children who have isolated mitral regurgitation. When clinical suspicion is high, the results of 2-dimensional echocardiography combined with color-flow Doppler studies in expert hands can establish the diagnosis, thus avoiding angiography in critically ill infants. The treatment of choice in our patients was transfer and reimplantation of the left coronary artery onto the ascending aorta. There were 2 deaths: both were infants in extremis who underwent emergency surgery. An older child with severe ventricular dysfunction was given mechanical ventricular assistance and then heart transplantation. As of this report, all 10 survivors remained well and asymptomatic. 相似文献
9.
10.