全文获取类型
收费全文 | 150748篇 |
免费 | 8374篇 |
国内免费 | 811篇 |
专业分类
耳鼻咽喉 | 1600篇 |
儿科学 | 4570篇 |
妇产科学 | 3466篇 |
基础医学 | 21380篇 |
口腔科学 | 6392篇 |
临床医学 | 13434篇 |
内科学 | 33775篇 |
皮肤病学 | 3866篇 |
神经病学 | 14553篇 |
特种医学 | 3561篇 |
外国民族医学 | 2篇 |
外科学 | 14536篇 |
综合类 | 676篇 |
一般理论 | 60篇 |
预防医学 | 14602篇 |
眼科学 | 2621篇 |
药学 | 10615篇 |
中国医学 | 659篇 |
肿瘤学 | 9565篇 |
出版年
2024年 | 159篇 |
2023年 | 1388篇 |
2022年 | 2976篇 |
2021年 | 5120篇 |
2020年 | 3138篇 |
2019年 | 4394篇 |
2018年 | 5099篇 |
2017年 | 3735篇 |
2016年 | 4232篇 |
2015年 | 4734篇 |
2014年 | 6230篇 |
2013年 | 8068篇 |
2012年 | 12262篇 |
2011年 | 12812篇 |
2010年 | 6911篇 |
2009年 | 5784篇 |
2008年 | 10025篇 |
2007年 | 9998篇 |
2006年 | 9145篇 |
2005年 | 8547篇 |
2004年 | 7809篇 |
2003年 | 6887篇 |
2002年 | 6256篇 |
2001年 | 1461篇 |
2000年 | 1305篇 |
1999年 | 1323篇 |
1998年 | 1068篇 |
1997年 | 846篇 |
1996年 | 755篇 |
1995年 | 600篇 |
1994年 | 565篇 |
1993年 | 457篇 |
1992年 | 574篇 |
1991年 | 471篇 |
1990年 | 454篇 |
1989年 | 377篇 |
1988年 | 367篇 |
1987年 | 329篇 |
1986年 | 320篇 |
1985年 | 257篇 |
1984年 | 274篇 |
1983年 | 245篇 |
1982年 | 222篇 |
1981年 | 198篇 |
1980年 | 192篇 |
1979年 | 159篇 |
1978年 | 145篇 |
1977年 | 115篇 |
1975年 | 100篇 |
1974年 | 99篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
A case of Rubinstein‐Taybi syndrome associated with growth hormone deficiency in childhood
下载免费PDF全文
![点击此处可从《Clinical endocrinology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
3.
4.
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
5.
Improvement in Tricuspid Annular Plane Systolic Excursion with Pulmonary Hypertension Therapy in Pediatric Patients
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
6.
Quality of life in stroke survivor–caregiver dyads: a new conceptual framework and longitudinal study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
7.
8.
9.
10.
Alejandra Gordillo Hernández Eduardo Dominguez-Adame Lanuza Auxiliadora Cano Matias Rosario Perez Huertas Katherine Maria Gallardo Rodriguez Purificacion Gallinato Perez Fernando Oliva Mompean 《World journal of gastrointestinal surgery》2015,7(8):170-173
Gangliocytic paragangliomas are rare tumors that almost exclusively occur within the second portion of the duodenum. Although these tumors generally have a benign clinical course, they have the potential to recur or metastasize to regional lymph nodes. The case report presented here describes a 57-year-old female patient with melena, progressive asthenia, anemia, and a mass in the second-third portion of the duodenum that was treated by local excision. The patient was diagnosed with a friable bleeding tumor. The histologic analysis showed that the tumor was a 4 cm gangliocytic paraganglioma without a malignant cell pattern. In the absence of local invasion or distant metastasis, endoscopic resection represents a feasible, curative therapy. Although endoscopic polypectomy is currently considered the treatment of choice, it is not recommended if the size of the tumor is > 3 cm and/or there is active or recent bleeding. Patients diagnosed with a gangliocytic paraganglioma should be closely followed-up for possible local recurrence. 相似文献