全文获取类型
收费全文 | 7189篇 |
免费 | 521篇 |
国内免费 | 69篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 176篇 |
妇产科学 | 214篇 |
基础医学 | 1023篇 |
口腔科学 | 103篇 |
临床医学 | 623篇 |
内科学 | 1793篇 |
皮肤病学 | 181篇 |
神经病学 | 883篇 |
特种医学 | 267篇 |
外科学 | 645篇 |
综合类 | 13篇 |
预防医学 | 468篇 |
眼科学 | 52篇 |
药学 | 525篇 |
中国医学 | 16篇 |
肿瘤学 | 747篇 |
出版年
2024年 | 15篇 |
2023年 | 123篇 |
2022年 | 258篇 |
2021年 | 371篇 |
2020年 | 246篇 |
2019年 | 302篇 |
2018年 | 315篇 |
2017年 | 252篇 |
2016年 | 297篇 |
2015年 | 334篇 |
2014年 | 402篇 |
2013年 | 494篇 |
2012年 | 726篇 |
2011年 | 706篇 |
2010年 | 386篇 |
2009年 | 301篇 |
2008年 | 411篇 |
2007年 | 381篇 |
2006年 | 359篇 |
2005年 | 290篇 |
2004年 | 237篇 |
2003年 | 204篇 |
2002年 | 149篇 |
2001年 | 24篇 |
2000年 | 20篇 |
1999年 | 15篇 |
1998年 | 31篇 |
1997年 | 13篇 |
1996年 | 13篇 |
1995年 | 14篇 |
1994年 | 6篇 |
1993年 | 11篇 |
1992年 | 9篇 |
1991年 | 7篇 |
1990年 | 2篇 |
1989年 | 11篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1984年 | 3篇 |
1979年 | 3篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1971年 | 2篇 |
1969年 | 2篇 |
1968年 | 2篇 |
1941年 | 1篇 |
排序方式: 共有7779条查询结果,搜索用时 0 毫秒
71.
Francesco Venturelli Giuliano Carrozzi Letizia Sampaolo Lara Bolognesi Sandro Baldissera Nicoletta Bertozzi Stefano Campostrini Benedetta Contoli Gianluigi Ferrante Maria Masocco Valentina Minardi Angelo D'Argenzio Pirous F Moghadam Luana Penna Alberto Perra Elisa Quarchioni Mauro Ramigni Massimo O Trinito Stefania Salmaso 《Lancet》2014
BackgroundInfluenza is an important public health problem, with potential severe consequences among people with chronic diseases. The aim of this study was to obtain reliable measures of seasonal influenza vaccine uptake in this population, otherwise not available in Italy.MethodsProgressi delle Aziende Sanitarie per la Salute in Italia (PASSI) is a nationwide surveillance system of health-related behaviours and acceptance of preventive interventions (including influenza immunisation) offered by the Italian National Health Service. Data are collected with telephone interviews at local health unit level for supporting local activities. The survey sample is randomly selected from local health unit lists of adult residents. The trend of annual vaccine coverage since 2008 was estimated for people aged 18–64 years who reported having at least one chronic disease. To obtain a sufficient sample size in subgroups, we analysed the characteristics of vaccinated people in the 2010–13 cumulative dataset. Univariate, multivariate, and logistic regression analyses were undertaken.FindingsIn 2008–13, 13 659 individuals with at least one chronic disease were interviewed. Vaccination coverage fell significantly from 29·7% (95% CI 27·2–32·4) in 2007–08 to 19·9% (18·0–22·1) in 2012–13. During 2010–13, the overall proportion of vaccinated people with a chronic disease was 25·6% (24·5–26·7). Vaccine coverage of people with diabetes (34·3%, 31·7–36·9) or cardiovascular diseases (31·8%, 29·6–34·2) was greater than that of people affected by renal failure, respiratory diseases, tumours, or chronic liver diseases (26·5% [22·5–30·7], 24·9% [23·2–26·7], 22·2% [20·0–24·6], and 20·6% [17·5–24·6], respectively). Vaccination coverage increased with age (from 13·1% [11·0–15·5] in the 18–34 year age group to 33·4% [31·9–35·1] in people aged 50–64 years); it was higher among people with a low educational level than among those with a high educational level, higher in those having economic difficulties than in those with no economic difficulties, and higher among Italian citizens than among non-citizens.InterpretationIn the past few years, prevalence of influenza vaccination in Italian adults with at least one chronic disease was well below the Ministry of Health's goal (75% minimum) and showed a downward trend. A major reason of this evolution is probably the changing public perception of the benefits and risks of vaccines. PASSI is a source of useful data not otherwise available for public health intervention.FundingItalian Ministry of Health. 相似文献
72.
Long‐term liver stiffness assessment in hepatitis C virus patients undergoing antiviral therapy: Results from a 5‐year cohort study 下载免费PDF全文
73.
Nulliparity is associated with subtle adverse metabolic outcomes in overweight/obese mothers and their offspring 下载免费PDF全文
74.
75.
Factors affecting difficult peripheral intravenous cannulation in adults: a prospective observational study 下载免费PDF全文
76.
77.
78.
79.
Prognostic value of chromogranin A in chronic heart failure: data from the GISSI‐Heart Failure trial
80.
Edoardo Giannini Paola Ceppa Federica Botta Alberto Fasoli Paola Romagnoli Elena Cresta Valentina Venturino Domenico Risso Guido Celie Roberto Testa 《Liver international》1999,19(5):432-437
Abstract: Background/Aims: Hepatitis C virus (HCV) related disease follows a long, benign course and most affected patients have mild disease. Liver biopsy is mandatory to grade and stage the disease. Characteristic, though non-specific, HCV histological lesions such as bile duct damage and steatosis have been singled out but their association with non-histological parameters has not been completely defined. Our aim was to study the relationships among these histological lesions and clinical, biochemical, functional and virological characteristics in a group of Northern Italian patients with chronic hepatitis. Methods: We studied 172 patients with HCV-related chronic hepatitis. Patients were divided into groups on the basis of histology including bile duct damage and steatosis. Clinical, biochemical, functional and virological profiles were related to histological findings. Results: Histological grading and staging of disease increased as the age of patients increased. Steatosis was present in 70% of our patients and was related to a higher degree of fibrosis and to decreased functional activity. The prevalence of bile duct damage was 20%. This lesion was present in older patients with higher staging and impaired liver function. Biochemically it was associated with an increase in aspartate aminotransferase, gammaglutamyltranspeptidase, alkaline phosphatase, and total bilirubin. Conclusions: In the population we studied, HCV chronic hepatitis was predominantly a mild disease. Moreover both steatosis and bile duct damage were also mild. Steatosis was associated with fibrosis and this might influence liver metabolic function. Bile duct lesions were found in older patients with advanced disease showing biochemical evidence of cholestasis. The molecular role HCV might play in the pathogenesis of these histological features should be addressed in further studies. 相似文献