全文获取类型
收费全文 | 14329篇 |
免费 | 903篇 |
国内免费 | 257篇 |
专业分类
耳鼻咽喉 | 287篇 |
儿科学 | 96篇 |
妇产科学 | 124篇 |
基础医学 | 2564篇 |
口腔科学 | 219篇 |
临床医学 | 1273篇 |
内科学 | 3148篇 |
皮肤病学 | 514篇 |
神经病学 | 1197篇 |
特种医学 | 978篇 |
外科学 | 1588篇 |
综合类 | 75篇 |
现状与发展 | 1篇 |
预防医学 | 482篇 |
眼科学 | 210篇 |
药学 | 1414篇 |
中国医学 | 235篇 |
肿瘤学 | 1084篇 |
出版年
2024年 | 8篇 |
2023年 | 106篇 |
2022年 | 388篇 |
2021年 | 634篇 |
2020年 | 283篇 |
2019年 | 389篇 |
2018年 | 468篇 |
2017年 | 353篇 |
2016年 | 520篇 |
2015年 | 720篇 |
2014年 | 890篇 |
2013年 | 963篇 |
2012年 | 1467篇 |
2011年 | 1377篇 |
2010年 | 784篇 |
2009年 | 656篇 |
2008年 | 842篇 |
2007年 | 840篇 |
2006年 | 672篇 |
2005年 | 653篇 |
2004年 | 497篇 |
2003年 | 443篇 |
2002年 | 397篇 |
2001年 | 198篇 |
2000年 | 197篇 |
1999年 | 153篇 |
1998年 | 75篇 |
1997年 | 66篇 |
1996年 | 36篇 |
1995年 | 30篇 |
1994年 | 37篇 |
1993年 | 25篇 |
1992年 | 41篇 |
1991年 | 29篇 |
1990年 | 40篇 |
1989年 | 32篇 |
1988年 | 30篇 |
1987年 | 27篇 |
1986年 | 20篇 |
1985年 | 28篇 |
1984年 | 12篇 |
1983年 | 13篇 |
1981年 | 8篇 |
1980年 | 4篇 |
1979年 | 9篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1976年 | 4篇 |
1974年 | 3篇 |
1973年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Clinical clues for differential diagnosis between verruca plana and verruca plana‐like seborrheic keratosis
下载免费PDF全文
![点击此处可从《The Journal of dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Won‐Jeong Kim Won‐Ku Lee Margaret Song Hoon‐Soo Kim Hyun‐Chang Ko Byung‐Soo Kim Moon‐Bum Kim 《The Journal of dermatology》2015,42(4):373-377
Sometimes the clinical differentiation between verruca plana (VP) and VP‐like seborrheic keratosis (SK) could be challenged. However, there have been no studies on this issue to date. The aim of this study was to elucidate clinical and dermoscopic differences between these two diseases, and also to suggest a diagnostic algorithm of VP and VP‐like SK without skin biopsy. The patients who had lesions clinically considered as VP or VP‐like SK were the target of our study. We took clinical and dermoscopic photos with informed consent and conducted a questionnaire. All patients had their diagnoses confirmed by biopsy. Thirty‐three patients were enrolled in our study. Seventeen patients were finally diagnosed with VP (51.5%) and 16 patients with VP‐like SK (48.5%). In clinical findings, VP‐like SK showed significantly more scattered distribution than VP (P = 0.039), which exhibited more clustered or grouped distribution (P = 0.039). In dermoscopic findings, brain‐like appearance was more commonly observed in VP‐like SK (P = 0.003) whereas VP showed more red dots or globular vessels (P = 0.017) and even‐colored light brown to yellow patch (P < 0.001). Sex, onset age, the size of each lesion, location, color and shape showed no significant differences between them (P > 0.05). Based on our results, we suggest a diagnostic algorithm using Koebner's phenomenon, dermoscopic findings, distribution of each lesion and biopsy for multiple VP‐like lesions in adults, and we think it will be a very useful diagnostic tool in daily clinical dermatological practice. 相似文献
5.
The cingulum, connecting the orbitofrontal cortex to the medial temporal lobe, involves in diverse cognition functions including attention, memory, and motivation. To investigate the relationship between the cingulum injury and cognitive impairment in patients with chronic mild traumatic brain injury, we evaluated the integrity between the anterior cingulum and the basal forebrain using diffusion tensor tractography in 73 patients with chronic mild traumatic brain injury(39 males, 34 females, age 43.29 ± 11.42 years) and40 healthy controls(22 males, 18 females, age 40.11 ± 16.81 years). The patients were divided into three subgroups based on the integrity between the anterior cingulum and the basal forebrain on diffusion tensor tractography: subgroup A(n = 19 patients)-both sides of the anterior cingulum were intact; subgroup B(n= 36 patients)-either side of the anterior cingulum was intact; and subgroup C(18 patients)-both sides of the anterior cingulum were discontinued. There were significant differences in total Memory Assessment Scale score between subgroups A and B and between subgroups A and C. There were no significant differences in diffusion tensor tractography parameters(fractional anisotropy, apparent diffusion coefficient, and fiber volume) between patients and controls. These findings suggest that the integrity between the anterior cingulum and the basal forebrain, but not diffusion tensor tractography parameter, can be used to predict the cognitive function of patients with chronic mild traumatic brain injury. This study was approved by Yeungnam University Hospital Institutional Review Board(approval No. YUMC-2014-01-425-010) on August 16, 2017. 相似文献
6.
7.
8.
9.
Hideaki Iwaki Kazuyoshi Johnin Susumu Kageyama Chul Jang Kim Takahiro Isono Tatsuhiro Yoshiki 《International journal of urology》2007,14(10):918-923
OBJECTIVES: Vesicoureteral reflux (VUR) is the most common congenital urinary tract anomaly. This disease can pose a major threat to the kidneys as twenty percent of patients with endstage renal disease are reported to have VUR. Although genetic studies for uroplakin III (UPIII) have been reported recently, no study has focused on UPIII gene expression in VUR patients. We describe here the up-regulation of UPIII mRNA in exfoliated urinary cells from primary VUR patients. METHODS: A real-time RT-PCR for UPIII mRNA was performed on exfoliated urothelial cells from 18 primary VUR and 38 control samples. UPIII mRNA copies were calculated for each sample. The statistical differences were assessed by the Mann-Whitney U test. Receiver operator characteristic curves were constructed for analysis of the diagnostic values. RESULTS: UPIII mRNA was found to be up-regulated to a greater extent in VUR than in control exfoliated urinary cells (mean +/- SE: 497.0 +/- 178.5 copies vs. 69.0 +/- 10.0 copies, respectively, P < 0.001). In evaluating the measurement of urinary UPIII mRNA as a screening test for VUR, the sensitivity was 77.8% and the specificity was 76.3% by the best diagnostic cutoff point. CONCLUSIONS: This is the first report demonstrating up-regulation of UPIII in mRNA levels in VUR patients. We submit that the quantitative measurement of urinary UPIII mRNA has a potential of developing into the first non-invasive screening test for VUR. 相似文献
10.