全文获取类型
收费全文 | 79750篇 |
免费 | 44731篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 1543篇 |
儿科学 | 4505篇 |
妇产科学 | 729篇 |
基础医学 | 16541篇 |
口腔科学 | 5147篇 |
临床医学 | 13307篇 |
内科学 | 23953篇 |
皮肤病学 | 7560篇 |
神经病学 | 14009篇 |
特种医学 | 2353篇 |
外科学 | 14125篇 |
综合类 | 48篇 |
一般理论 | 32篇 |
预防医学 | 4789篇 |
眼科学 | 1349篇 |
药学 | 5883篇 |
中国医学 | 1015篇 |
肿瘤学 | 7624篇 |
出版年
2023年 | 80篇 |
2022年 | 96篇 |
2021年 | 1414篇 |
2020年 | 5142篇 |
2019年 | 10960篇 |
2018年 | 10244篇 |
2017年 | 11546篇 |
2016年 | 12232篇 |
2015年 | 12062篇 |
2014年 | 12029篇 |
2013年 | 12614篇 |
2012年 | 4544篇 |
2011年 | 4460篇 |
2010年 | 9125篇 |
2009年 | 5455篇 |
2008年 | 2502篇 |
2007年 | 1314篇 |
2006年 | 1317篇 |
2005年 | 1128篇 |
2004年 | 1082篇 |
2003年 | 1034篇 |
2002年 | 1111篇 |
2001年 | 821篇 |
2000年 | 719篇 |
1999年 | 310篇 |
1998年 | 118篇 |
1997年 | 102篇 |
1996年 | 86篇 |
1995年 | 83篇 |
1994年 | 65篇 |
1993年 | 59篇 |
1992年 | 40篇 |
1991年 | 40篇 |
1990年 | 34篇 |
1989年 | 32篇 |
1988年 | 30篇 |
1987年 | 23篇 |
1986年 | 33篇 |
1985年 | 35篇 |
1984年 | 35篇 |
1983年 | 28篇 |
1982年 | 23篇 |
1981年 | 38篇 |
1980年 | 26篇 |
1979年 | 19篇 |
1978年 | 21篇 |
1977年 | 14篇 |
1976年 | 19篇 |
1972年 | 10篇 |
1971年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
962.
963.
964.
965.
966.
R C Hoogeveen P J Guicherit S R Gopie P F van der Stelt W E R Berkhout 《Dento maxillo facial radiology》2014,43(3)
The use of an anatomically shaped cranial collimator (ACC) to reduce patient dose in orthodontic lateral cephalography was investigated in this study. The aim was to evaluate the potential interference of the ACC on landmark identification for orthodontic cephalometry. Consecutive orthodontic patients underwent a total of 100 cephalograms using an ACC mounted on a Veraviewepocs® 3D X550 (J. Morita Co., Kyoto, Japan) X-ray unit. 10 observers were asked whether the identification of 5 landmarks close to the collimated area was hindered or rendered impossible by the presence of the collimator. Of the 500 landmarks that were judged by the 10 observers, 496 (99.2%) were reported to lack hindrance. In three landmarks, a minority of the observers reported hindrance. In 1 landmark, 8 of the 10 observers reported hindrance by the collimator. In no instance did the observers state that the identification of landmarks was impossible as a result of the collimation. Application of the ACC on the cephalostat of the X-ray unit is a viable way of reducing patient dose, as it only marginally interferes with the diagnostic yield of the exposure. The need to retake images when the ACC is applied was found to be extremely low. 相似文献
967.
968.
969.
Cutaneous histoplasmosis with prominent parasitization of epidermal keratinocytes: report of a case
下载免费PDF全文
![点击此处可从《Journal of cutaneous pathology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hedieh H. Honarpisheh Jonathan L. Curry Kristen Richards Priyadharsini Nagarajan Phyu P. Aung Carlos A. Torres‐Cabala Doina Ivan Carol R. Drucker Richard Cartun Victor G. Prieto Michael T. Tetzlaff 《Journal of cutaneous pathology》2016,43(12):1155-1160
Disseminated histoplasmosis most commonly occurs in immunosuppressed individuals and involves the skin in approximately 6% of patients. Cutaneous histoplasmosis with an intraepithelial‐predominant distribution has not been described. A 47‐year‐old man was admitted to our institution with fever and vancomycin‐resistant enterococcal bacteremia. He had been diagnosed with T‐cell prolymphocytic leukemia 4 years earlier and had undergone matched‐unrelated‐donor stem cell transplant 2 years earlier; on admission, he had relapsed disease. His medical history was significant for disseminated histoplasmosis 6 months before admission, controlled with multiple antifungal regimens. During this final hospitalization, the patient developed multiple 2–5 mm erythematous papules, a hemorrhagic crust across the chest, shoulders, forearms, dorsal aspect of the fingers, abdomen and thighs. Skin biopsy revealed clusters of oval yeast forms mostly confined to the cytoplasm of keratinocytes and within the stratum corneum; scattered organisms were present in the underlying superficial dermis without any significant associated inflammatory infiltrate. Special stains and immunohistochemical studies confirmed these to be Histoplasma organisms. We highlight this previously unrecognized pattern of cutaneous histoplasmosis to ensure its prompt recognition and appropriate antifungal therapy. 相似文献
970.