全文获取类型
收费全文 | 4264篇 |
免费 | 231篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 45篇 |
儿科学 | 92篇 |
妇产科学 | 82篇 |
基础医学 | 449篇 |
口腔科学 | 116篇 |
临床医学 | 310篇 |
内科学 | 1015篇 |
皮肤病学 | 58篇 |
神经病学 | 463篇 |
特种医学 | 163篇 |
外科学 | 965篇 |
综合类 | 5篇 |
预防医学 | 112篇 |
眼科学 | 107篇 |
药学 | 180篇 |
中国医学 | 4篇 |
肿瘤学 | 382篇 |
出版年
2024年 | 6篇 |
2023年 | 41篇 |
2022年 | 111篇 |
2021年 | 197篇 |
2020年 | 107篇 |
2019年 | 121篇 |
2018年 | 151篇 |
2017年 | 101篇 |
2016年 | 137篇 |
2015年 | 156篇 |
2014年 | 193篇 |
2013年 | 257篇 |
2012年 | 334篇 |
2011年 | 347篇 |
2010年 | 196篇 |
2009年 | 187篇 |
2008年 | 225篇 |
2007年 | 232篇 |
2006年 | 221篇 |
2005年 | 180篇 |
2004年 | 191篇 |
2003年 | 168篇 |
2002年 | 171篇 |
2001年 | 78篇 |
2000年 | 43篇 |
1999年 | 45篇 |
1998年 | 29篇 |
1997年 | 23篇 |
1996年 | 15篇 |
1995年 | 18篇 |
1994年 | 11篇 |
1993年 | 16篇 |
1992年 | 19篇 |
1991年 | 21篇 |
1990年 | 29篇 |
1989年 | 11篇 |
1988年 | 13篇 |
1987年 | 12篇 |
1986年 | 11篇 |
1985年 | 19篇 |
1984年 | 12篇 |
1983年 | 10篇 |
1982年 | 10篇 |
1981年 | 9篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1971年 | 5篇 |
1969年 | 9篇 |
1968年 | 6篇 |
1966年 | 7篇 |
排序方式: 共有4548条查询结果,搜索用时 15 毫秒
81.
Nicola Crea Giacomo Pata Ernesto Di Betta Amin Titi Francesco Mittempergher 《Obesity surgery》2011,21(2):151-156
Although the appendix has been recognized as a preferential site for carcinoid tumors in obese patients, no definitive guidelines
are so far available regarding the management of these patients when candidates for bariatric surgery. This study was designed
to fill that gap. Between 2000-2008, 558 patients underwent bariatric procedures. Appendectomy was routinely performed in
477 cases. Their charts were retrospectively retrieved and histopathology responses on surgical specimens were recorded. We
aimed to assess: incidence of appendix carcinoid tumors (ACTs) and any possible risk-factor; modality of diagnosis (pre-,
intra- or post-operatively); impact on the planned bariatric procedure; treatment reserved to such cases. Typical ACTs were
diagnosed in 7 patients (1.4%) (median age: 33 years; median BMI: 49 kg/m2; males/females: 1/6). Four were diagnosed intra-operatively.
Because of dimensions (<2 cm) and absence of mesoappendiceal or serosal involvement, simple appendectomy was performed during
bariatric procedure, as planned. Three were diagnosed post-operatively (all <2 cm). In 1 case right hemicolectomy was performed
1 month later due to mesoappendiceal involvement. No appendectomy-related complication was encountered. All patients remained
tumor-free during follow-up (mean: 64 months; range, 25-92). Young age, female sex, high BMI and diabetes mellitus resulted
significantly associated with ACT. Our study sustains routine appendectomy or at least careful investigation of the appendix
during bariatric surgery. For tumors <2 cm without mesoappendiceal or serosal involvement, simple appendectomy proved sufficient.
Bariatric surgery did not have a negative effect on the treatment of malignancies that are discovered intra- or post-operatively. 相似文献
82.
83.
84.
Primary cardiac T-cell lymphoma 总被引:1,自引:0,他引:1
Giunta R Cravero RG Granata G Sellitto A Romano C De Fanis U Foccillo G De Capite C Santini M Rossiello L Rossiello R Lucivero G 《Annals of hematology》2004,83(7):450-454
Primary cardiac lymphoma (PCL), defined as a lymphoma clinically mimicking cardiac disease, with the bulk of the tumor located intrapericardially, is extremely rare in immunocompetent patients. Clinical manifestations vary depending on sites of involvement in the heart and include chest pain, arrhythmias, pericardial effusion, and heart failure. Diagnosis is often difficult and may require invasive procedures; in some cases, diagnosis is not made until autopsy. Histologically, nearly all cases of PCL reported thus far have been of B-cell origin. In this report, we describe a case of PCL of T-cell origin in an adult immunocompetent patient, the second reported in the literature to the best of our knowledge, and provide a brief overview of the features of previously published PCL cases. 相似文献
85.
86.
Ghyslaine Bruna Djeunang Dongho Karthigayan Gunalan Mariangela LEpiscopia Giacomo Maria Paganotti Michela Menegon Rose Efeutmecheh Sangong Georges Bouting Mayaka Joseph Fondop Carlo Severini Martin Sanou Sobze Louis H. Miller Gianluca Russo 《The American journal of tropical medicine and hygiene》2021,104(3):987
87.
Paola Frati Chrystalla Kyriakou Alessandro Del Rio Enrico Marinelli Gianluca Montanari Vergallo Simona Zaami Francesco P. Busardò 《Current Neuropharmacology》2015,13(1):5-11
Cognitive enhancement can be defined as the use of drugs and/or other means with the
aim to improve the cognitive functions of healthy subjects in particular memory, attention, creativity
and intelligence in the absence of any medical indication. Currently, it represents one of the most
debated topics in the neuroscience community. Human beings always wanted to use substances to
improve their cognitive functions, from the use of hallucinogens in ancient civilizations in an attempt
to allow them to better communicate with their gods, to the widespread use of caffeine under various
forms (energy drinks, tablets, etc.), to the more recent development of drugs such as stimulants and glutamate activators.
In the last ten years, increasing attention has been given to the use of cognitive enhancers, but up to now there is still only
a limited amount of information concerning the use, effect and functioning of cognitive enhancement in daily life on
healthy subjects. The first aim of this paper was to review current trends in the misuse of smart drugs (also known as
Nootropics) presently available on the market focusing in detail on methylphenidate, trying to evaluate the potential risk
in healthy individuals, especially teenagers and young adults. Moreover, the authors have explored the issue of cognitive
enhancement compared to the use of Anabolic Androgenic Steroids (AAS) in sports. Finally, a brief overview of the
ethical considerations surrounding human enhancement has been examined. 相似文献
88.
89.
Gelardi Matteo Ciprandi Giorgio Incorvaia Cristoforo Buttafava Serena Leo Eleonora Iannuzzi Lucia Quaranta Nicola Frati Franco 《Inflammation research》2015,64(6):373-375
Inflammation Research - Allergic rhinitis (AR) is characterized by typical symptoms that are dependent on inflammation. Poly-allergy is a frequent phenomenon. Phenotyping AR represents an... 相似文献
90.
Simon Rauch Tomas Dal Cappello Giacomo Strapazzon Martin Palma Francesco Bonsante Elisabeth Gruber Mathias Ströhle Peter Mair Hermann Brugger 《The American journal of emergency medicine》2018,36(10):1749-1753