全文获取类型
收费全文 | 2488篇 |
免费 | 180篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 21篇 |
儿科学 | 81篇 |
妇产科学 | 76篇 |
基础医学 | 294篇 |
口腔科学 | 65篇 |
临床医学 | 345篇 |
内科学 | 560篇 |
皮肤病学 | 46篇 |
神经病学 | 114篇 |
特种医学 | 213篇 |
外科学 | 316篇 |
综合类 | 46篇 |
一般理论 | 2篇 |
预防医学 | 194篇 |
眼科学 | 43篇 |
药学 | 145篇 |
肿瘤学 | 110篇 |
出版年
2021年 | 30篇 |
2020年 | 16篇 |
2019年 | 23篇 |
2018年 | 30篇 |
2017年 | 16篇 |
2016年 | 17篇 |
2015年 | 36篇 |
2014年 | 41篇 |
2013年 | 59篇 |
2012年 | 78篇 |
2011年 | 96篇 |
2010年 | 73篇 |
2009年 | 72篇 |
2008年 | 81篇 |
2007年 | 102篇 |
2006年 | 87篇 |
2005年 | 86篇 |
2004年 | 75篇 |
2003年 | 80篇 |
2002年 | 67篇 |
2001年 | 64篇 |
2000年 | 81篇 |
1999年 | 70篇 |
1998年 | 72篇 |
1997年 | 75篇 |
1996年 | 69篇 |
1995年 | 55篇 |
1994年 | 31篇 |
1993年 | 41篇 |
1992年 | 68篇 |
1991年 | 68篇 |
1990年 | 65篇 |
1989年 | 58篇 |
1988年 | 72篇 |
1987年 | 68篇 |
1986年 | 70篇 |
1985年 | 53篇 |
1984年 | 31篇 |
1983年 | 29篇 |
1982年 | 24篇 |
1981年 | 31篇 |
1980年 | 17篇 |
1979年 | 33篇 |
1978年 | 26篇 |
1977年 | 16篇 |
1975年 | 16篇 |
1973年 | 17篇 |
1972年 | 21篇 |
1971年 | 14篇 |
1970年 | 17篇 |
排序方式: 共有2671条查询结果,搜索用时 15 毫秒
91.
Jared Nathanson Daniel T. Swarr Amihood Singer Mochi Liu Amy Chinn Wendy Jones Jane Hurst Nahla Khalek Elaine Zackai Anne Slavotinek 《American journal of medical genetics. Part A》2013,161(3):473-478
Loss of function mutations in FREM1 have been demonstrated in Manitoba‐oculo‐tricho‐anal (MOTA) syndrome and Bifid Nose Renal Agenesis and Anorectal malformations (BNAR) syndrome, but the wider phenotypic spectrum that is associated with FREM1 mutations remains to be defined. We screened three probands with phenotypic features of MOTA syndrome. In one severely affected infant who was diagnosed with MOTA syndrome because of bilateral eyelid colobomas, a bifid nasal tip, hydrometrocolpos and vaginal atresia, we found two nonsense mutations that likely result in complete loss of FREM1 function. This infant also had renal dysplasia, a finding more consistent with BNAR syndrome. Another male who was homozygous for a novel stop mutation had an extensive eyelid colobomas, corneopalpebral synechiae, and unilateral renal agenesis. A third male child diagnosed with MOTA syndrome because of corneopalpebral synechiae and eyelid colobomas had a homozygous splice site mutation in FREM1. These cases illustrate that disruption of the FREM1 gene can produce a spectrum of clinical manifestations encompassing the previously described MOTA and BNAR syndromes, and that features of both syndromes may be seen in the same individual. The phenotype of FREM1‐related disorders is thus more pleiotropic than for MOTA and BNAR syndrome alone and more closely resembles the widespread clinical involvement seen with Fraser syndrome. Moreover, our first case demonstrates that vaginal atresia may be a feature of FREM1‐related disorders. © 2013 Wiley Periodicals, Inc. 相似文献
92.
93.
94.
95.
George W. Deimel MD Richard W. Hurst MD Eric J. Sorenson MD Andrea J. Boon MD 《Muscle & nerve》2013,47(2):274-276
Introduction: The aim of this study was to assess the reliability of a near‐nerve needle recording technique in lateral femoral cutaneous nerve (LFCN) sensory nerve conduction studies (NCS). Methods: Bilateral LFCN sensory nerve action potentials (SNAPs) were recorded from 10 healthy volunteers using surface and near‐nerve needle recording electrodes. Absolute amplitudes were compared side‐to‐side in each subject and between the 2 techniques. Results: Near‐nerve needle electrode recording amplitude was significantly higher when compared with surface electrode recording (surface 9 μV, needle 58 μV; P < 0.0001), whereas side‐to‐side variability did not differ (surface 37%, needle 37%; P = 0.94). Conclusions: We propose that near‐nerve needle recording is a simple technique to employ for clinicians with experience in ultrasound‐guided needle placement, especially when evaluation is critical and responses are difficult to obtain. However, given the degree of side‐to‐side variability in healthy subjects, we recommend caution when interpreting side‐to‐side differences. Muscle Nerve, 2013 相似文献
96.
Intratumoral lymphatic vessel density as a predictor of progression‐free and overall survival in locally advanced laryngeal/hypopharyngeal cancer
下载免费PDF全文
![点击此处可从《Head & neck》网站下载免费的PDF全文](/ch/ext_images/free.gif)
97.
Pretreatment computed tomographic gross tumor volume as predictor of persistence of tracheostomy and percutaneous endoscopic gastrostomy tube in patients undergoing larynx preservation
下载免费PDF全文
![点击此处可从《Head & neck》网站下载免费的PDF全文](/ch/ext_images/free.gif)
98.
99.
100.