全文获取类型
收费全文 | 539篇 |
免费 | 21篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 39篇 |
妇产科学 | 23篇 |
基础医学 | 69篇 |
口腔科学 | 25篇 |
临床医学 | 61篇 |
内科学 | 103篇 |
皮肤病学 | 12篇 |
神经病学 | 40篇 |
特种医学 | 70篇 |
外科学 | 64篇 |
综合类 | 20篇 |
一般理论 | 1篇 |
预防医学 | 20篇 |
眼科学 | 5篇 |
药学 | 12篇 |
肿瘤学 | 16篇 |
出版年
2022年 | 2篇 |
2021年 | 10篇 |
2020年 | 7篇 |
2019年 | 5篇 |
2018年 | 7篇 |
2017年 | 4篇 |
2016年 | 4篇 |
2015年 | 9篇 |
2014年 | 11篇 |
2013年 | 14篇 |
2012年 | 15篇 |
2011年 | 14篇 |
2010年 | 19篇 |
2009年 | 19篇 |
2008年 | 16篇 |
2007年 | 36篇 |
2006年 | 18篇 |
2005年 | 17篇 |
2004年 | 14篇 |
2003年 | 14篇 |
2002年 | 11篇 |
2001年 | 22篇 |
2000年 | 13篇 |
1999年 | 12篇 |
1998年 | 11篇 |
1997年 | 13篇 |
1996年 | 22篇 |
1995年 | 10篇 |
1994年 | 20篇 |
1993年 | 13篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 19篇 |
1988年 | 8篇 |
1987年 | 18篇 |
1986年 | 18篇 |
1985年 | 13篇 |
1984年 | 10篇 |
1983年 | 8篇 |
1982年 | 7篇 |
1981年 | 12篇 |
1980年 | 9篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 7篇 |
1975年 | 3篇 |
1973年 | 6篇 |
1970年 | 2篇 |
1957年 | 2篇 |
排序方式: 共有581条查询结果,搜索用时 15 毫秒
11.
12.
13.
DZ Loesch F Tassone J Lo HR Slater LV Hills MQ Bui PA Silburn GD Mellick 《Clinical genetics》2013,84(4):382-385
We recently reported a significant increase in the frequency of carriers of grey zone (GZ) alleles of FMR1 gene in Australian males with Parkinson's disease (PD) from Victoria and Tasmania. Here, we report data comparing an independent sample of 817 PD patients from Queensland to 1078 consecutive Australian male newborns from Victoria. We confirmed the earlier finding by observing a significant excess of GZ alleles in PD (4.8%) compared to controls (1.5%). Although both studies provided evidence in support of an association between GZ‐carrier status and increased risk for parkinsonism, the existing evidence in the literature from screening studies remains equivocal and we discuss the need for alternative approaches to resolve the issue. 相似文献
14.
15.
背景和目的:最近的研究结果表明,对其他一线药物和注射类药物(如卡那霉素、卷曲霉素)等耐药是影响耐多药结核病(MDR-TB)患者治疗效果的独立危险因素.本研究旨在明确耐其他一线药物和注射类药物对韩国不合并人免疫缺陷病毒(HIV)感染的MDR-TB患者临床疗效的影响.方法:采用回顾性队列研究分析1996年1月至2005年12月首尔国家大学附属医院治疗的211例MDR-TB患者治疗效果,排除7例丢失和7例迁出,对197例患者进行了最终分析. 相似文献
16.
17.
SUMMARY We report an unusual case of a pharyngeal diverticulum arising as a result of extrusion of a bone graft inserted during anterior cervical fusion operation. The dense scar tissue at the site of extrusion of the bone graft probably caused traction on the posterior pharyngeal wall, with the development of a pharyngeal pouch. This is believed to be the first case with acquired pharyngeal diverticulum following anterior cervical fusion to be recorded in the literature. 相似文献
18.
Grize L Gassner M Wüthrich B Bringolf-Isler B Takken-Sahli K Sennhauser FH Stricker T Eigenmann PA Braun-Fahrländer C;Swiss Surveillance Programme on Childhood Allergy Respiratory symptoms with respect to Air Pollution 《Allergy》2006,61(5):556-562
BACKGROUND: Changing occurrence rates of asthma, allergic rhinitis and atopic dermatitis are of public health concern and require surveillance. Changes in prevalence rates of these atopic diseases were monitored during 10 years and their trend with time was determined taking into account the influence of personal and environmental risk factors. METHODS: Four cross-sectional surveys in 5-7-year old children were performed in seven different communities in Switzerland between 1992 and 2001. Prevalence of respiratory and allergic symptoms and of affecting risk factors including parental environmental concern were assessed using a standardized parental questionnaire. RESULTS: A total of 988 (74.1%), 1778 (79.0%), 1406 (82.6%) and 1274 (78.9%) children participated, respectively, in the 1992, 1995, 1998 and 2001 surveys. Prevalence rates of asthma and hay fever symptoms remained quite stable over time (wheeze/past year: 8.8%, 7.8%, 6.4% and 7.4%, sneezing attack during pollen season: 5.0%, 5.6%, 5.4% and 4.6%). Rates of reported atopic dermatitis symptoms (specific skin rash/past year: 4.6%, 6.5%,7.4% and 7.6%) showed an increase over time, but those of diagnosis of eczema did not show a clear pattern (18.4%, 15.7%, 14.0% and 15.2%). Stratified analysis by parental environmental concern and by parental atopy showed similar trends. Rates of atopic dermatitis symptoms showed significant increase in girls but stayed stable in boys. CONCLUSION: Results of these four consecutive surveys suggest that the increase in prevalence of asthma and hay fever in 5-7-year old children living in Switzerland may have ceased. However, symptoms of atopic dermatitis may still be on the rise, especially among girls. 相似文献
19.
20.
Parathyroid adenomas in the aortopulmonary window 总被引:3,自引:0,他引:3