全文获取类型
收费全文 | 935篇 |
免费 | 52篇 |
国内免费 | 66篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 69篇 |
妇产科学 | 8篇 |
基础医学 | 155篇 |
口腔科学 | 85篇 |
临床医学 | 113篇 |
内科学 | 179篇 |
皮肤病学 | 17篇 |
神经病学 | 35篇 |
特种医学 | 115篇 |
外科学 | 99篇 |
综合类 | 20篇 |
预防医学 | 30篇 |
药学 | 92篇 |
中国医学 | 2篇 |
肿瘤学 | 29篇 |
出版年
2018年 | 11篇 |
2017年 | 11篇 |
2016年 | 15篇 |
2015年 | 14篇 |
2014年 | 28篇 |
2013年 | 48篇 |
2012年 | 25篇 |
2011年 | 13篇 |
2010年 | 47篇 |
2009年 | 27篇 |
2008年 | 14篇 |
2007年 | 36篇 |
2006年 | 10篇 |
2005年 | 10篇 |
2003年 | 9篇 |
2002年 | 14篇 |
2001年 | 17篇 |
2000年 | 16篇 |
1999年 | 11篇 |
1998年 | 30篇 |
1997年 | 40篇 |
1996年 | 36篇 |
1995年 | 28篇 |
1994年 | 27篇 |
1993年 | 21篇 |
1992年 | 7篇 |
1991年 | 14篇 |
1990年 | 28篇 |
1989年 | 22篇 |
1988年 | 19篇 |
1987年 | 23篇 |
1986年 | 27篇 |
1985年 | 26篇 |
1984年 | 15篇 |
1983年 | 18篇 |
1982年 | 19篇 |
1981年 | 17篇 |
1980年 | 16篇 |
1979年 | 10篇 |
1978年 | 17篇 |
1977年 | 13篇 |
1976年 | 10篇 |
1975年 | 16篇 |
1974年 | 9篇 |
1973年 | 11篇 |
1972年 | 8篇 |
1969年 | 7篇 |
1955年 | 7篇 |
1930年 | 10篇 |
1923年 | 8篇 |
排序方式: 共有1053条查询结果,搜索用时 15 毫秒
1.
2.
The advantages of the new, safer, but more expensive iodinated contrast agents are discussed, and opinions on which patient groups should receive the agents are presented. 相似文献
3.
Soluble CD14 but not interleukin-6 is a new marker for clinical activity in atopic dermatitis 总被引:4,自引:0,他引:4
Summary Levels of soluble IL-2 receptors, IL-6, soluble CD23, soluble CD14 and ECP (eosinophilic cationic protein) were measured as markers of T-cell, B-cell, monocyte and eosinophilic leucocyte activation in 26 patients with atopic dermatitis (AD) on admission to (A) and at discharge from (D) the Department of Dermatology in Zurich. The serum levels of sIL-2R, IL-6, sCD23, sCD14 and ECP were significantly elevated in AD patients in comparison with the normal values of healthy donors. A significant decrease in sIL-2R (p=0.0093) and in sCD14 (p=0.0134) levels was demonstrated between A and D, correlating with the improvement in the skin intensity score (SIS). In addition, a significant correlation of the sCD14 levels and the SIS at A was demonstrated (p=0.0415). These results also incriminate monocytes in the pathogenesis of AD, indicating that, besides sIL-2R and ECP, SCD14 could also be a possible marker for the disease activity. 相似文献
4.
5.
A modified technique for catheterization of the pulmonary artery was developed. It involves the passage of a tapered, movable-core, J-tipped guide wire across the right ventricle into the pulmonary artery followed by the advancement of a straightened Grollman pigtail catheter. The technique was successful in 34 of 34 pulmonary artery catheterizations. The method avoids prolonged catheter manipulation within the right ventricle. In addition, since the catheter does not cross the tricuspid valve until the guide wire has been advanced, the occasional complication of the pigtail "hooking" on a tricuspid valve leaflet or chordae tendineae during catheter withdrawal and manipulation is prevented. 相似文献
6.
MIA SON JEONG‐OK KONG SANG‐BAEK KOH JAEYOUNG KIM MIKKO HÄRMÄ 《Journal of sleep research》2008,17(4):385-394
We investigated the effects of 12‐hour shift work for five to seven consecutive days and overtime on the prevalence of severe sleepiness in the automobile industry in Korea. [Correction added after online publication 28 Nov: Opening sentence of the summary has been rephrased for better clarity.] A total of 288 randomly selected male workers from two automobile factories were selected and investigated using questionnaires and sleep‐wake diaries in South Korea. The prevalence of severe sleepiness at work [i.e. Karolinska Sleepiness Scale (KSS) score of 7 or higher] was modeled using marginal logistic regression and included theoretical risk factors related to working hours and potential confounding factors related to socio‐economic status, work demands, and health behaviors. Factors related to working hours increased the risk for severe sleepiness at the end of the shift in the following order: the night shift [odds ratio (OR): 4.7; 95% confidence interval (CI): 3.6–6.0)], daily overtime (OR: 2.2; 95% CI: 1.7–2.9), weekly overtime (OR: 1.6; 95% CI: 1.0–2.6), and night overtime (OR: 1.6; 95% CI: 0.8–3.0). Long working hours and shift work had a significant interactive effect for severe sleepiness at work. Night shift workers who worked for 12 h or more a day were exposed to a risk of severe sleepiness that was 7.5 times greater than day shift workers who worked less than 11 h. Night shifts and long working hours were the main risk factors for severe sleepiness among automobile factory workers in Korea. Night shifts and long working hours have a high degree of interactive effects resulting in severe sleepiness at work, which highlight the need for immediate measures to address these characteristics among South Korean labor force patterns. 相似文献
7.
8.
乳腺管状小叶癌(Tubulolobular carcinoma,TLC)最初是被作为小叶癌的管状变型。作者总结了27例TLC的组织学、免疫表型和临床特征,并与纯小管癌和经典型小叶癌进行了比较。此组患者年龄43-79岁(中位年龄60岁)。1例双侧乳腺受累,5例病变为多灶性。肿瘤直径0.5-2.5cm,色灰褐,质硬。组织学观察:TLC的肿瘤细胞形成管状和条索状两种结构模式并相互混杂,且两者比例相当(统称为管状小叶模式)。 相似文献
9.
10.