全文获取类型
收费全文 | 6844篇 |
免费 | 686篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 72篇 |
儿科学 | 165篇 |
妇产科学 | 213篇 |
基础医学 | 1008篇 |
口腔科学 | 52篇 |
临床医学 | 665篇 |
内科学 | 1486篇 |
皮肤病学 | 219篇 |
神经病学 | 605篇 |
特种医学 | 283篇 |
外科学 | 885篇 |
综合类 | 43篇 |
一般理论 | 3篇 |
预防医学 | 536篇 |
眼科学 | 196篇 |
药学 | 306篇 |
中国医学 | 3篇 |
肿瘤学 | 814篇 |
出版年
2023年 | 50篇 |
2022年 | 106篇 |
2021年 | 249篇 |
2020年 | 109篇 |
2019年 | 176篇 |
2018年 | 161篇 |
2017年 | 137篇 |
2016年 | 139篇 |
2015年 | 189篇 |
2014年 | 234篇 |
2013年 | 280篇 |
2012年 | 398篇 |
2011年 | 435篇 |
2010年 | 245篇 |
2009年 | 186篇 |
2008年 | 293篇 |
2007年 | 359篇 |
2006年 | 320篇 |
2005年 | 321篇 |
2004年 | 339篇 |
2003年 | 300篇 |
2002年 | 261篇 |
2001年 | 203篇 |
2000年 | 203篇 |
1999年 | 159篇 |
1998年 | 82篇 |
1997年 | 52篇 |
1996年 | 45篇 |
1995年 | 34篇 |
1994年 | 36篇 |
1993年 | 44篇 |
1992年 | 117篇 |
1991年 | 110篇 |
1990年 | 92篇 |
1989年 | 106篇 |
1988年 | 98篇 |
1987年 | 88篇 |
1986年 | 101篇 |
1985年 | 71篇 |
1984年 | 60篇 |
1983年 | 57篇 |
1982年 | 50篇 |
1981年 | 26篇 |
1980年 | 29篇 |
1979年 | 45篇 |
1978年 | 39篇 |
1976年 | 30篇 |
1975年 | 36篇 |
1974年 | 33篇 |
1973年 | 25篇 |
排序方式: 共有7554条查询结果,搜索用时 15 毫秒
1.
Alina Goldenberg B.A. Catalina Matiz M.D. Lawrence F. Eichenfield M.D. 《Pediatric dermatology》2015,32(4):e191-e192
Henna, derived from a combination of natural leaves and coloring additives, is a common decorative dye traditionally used in many Islamic religious celebrations. Para‐phenylenediamine (PPD), a major component of black henna tattoo, is a strong sensitizer and common allergen. We report a case of severe connubial allergic contact dermatitis after black henna heterotransfer in a girl. 相似文献
2.
3.
4.
5.
Nickel Allergy and Our Children's Health: A Review of Indexed Cases and a View of Future Prevention
下载免费PDF全文
![点击此处可从《Pediatric dermatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Sharon E. Jacob M.D. Alina Goldenberg M.D. M.A.S. Janice L. Pelletier M.D. Luz S. Fonacier M.D. Richard Usatine M.D. Nanette Silverberg M.D. 《Pediatric dermatology》2015,32(6):779-785
Nickel is the leading cause of allergic contact dermatitis (ACD) from early childhood through adolescence. Studies have shown that skin piercings and other nickel‐laden exposures can trigger the onset of nickel ACD in those who are susceptible. Nickel ACD causes a vast amount of cutaneous disease in children. Cases of nickel ACD in children have been reported in peer‐reviewed literature from 28 states. Common items that contain inciting nickel include jewelry, coins, zippers, belts, tools, toys, chair studs, cases for cell phones and tablets, and dental appliances. The diagnosis of nickel ACD has been routinely confirmed by patch testing in children older than 6 months suspected of ACD from nickel. Unlike in Europe, there are no mandatory restrictions legislated for nickel exposure in the United States. Denmark has demonstrated that regulation of the nickel content in metals can lower the risk of ACD and the associated health care–related costs that arise from excess nickel exposure. To further awareness, this article reviews the prominent role of nickel in pediatric skin disease in the United States. It discusses the need for a campaign by caretakers to reduce nickel‐related morbidity. Lastly, it promotes the model of European legislation as a successful intervention in the prevention of nickel ACD. 相似文献
6.
7.
8.
9.
Sabrina Hundt Ulrike Haug Hermann Brenner 《Cancer epidemiology, biomarkers & prevention》2007,16(10):1935-1953
BACKGROUND: Despite different available methods for colorectal cancer (CRC) screening and their proven benefits, morbidity, and mortality of this malignancy are still high, partly due to low compliance with screening. Minimally invasive tests based on the analysis of blood specimens may overcome this problem. The purpose of this review was to give an overview of published studies on blood markers aimed at the early detection of CRC and to summarize their performance characteristics. METHOD: The PUBMED database was searched for relevant studies published until June 2006. Only studies with more than 20 cases and more than 20 controls were included. Information on the markers under study, on the underlying study populations, and on performance characteristics was extracted. Special attention was given to performance characteristics by tumor stage. RESULTS: Overall, 93 studies evaluating 70 different markers were included. Most studies were done on protein markers, but DNA markers and RNA markers were also investigated. Performance characteristics varied widely between different markers, but also between different studies using the same marker. Promising results were reported for some novel assays, e.g., assays based on SELDI-TOF MS or MALDI-TOF MS, for some proteins (e.g., soluble CD26 and bone sialoprotein) and also for some genetic assays (e.g., L6 mRNA), but evidence thus far is restricted to single studies with limited sample size and without further external validation. CONCLUSIONS: Larger prospective studies using study populations representing a screening population are needed to verify promising results. In addition, future studies should pay increased attention to the potential of detecting precursor lesions. 相似文献
10.