全文获取类型
收费全文 | 592篇 |
免费 | 22篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 19篇 |
妇产科学 | 6篇 |
基础医学 | 52篇 |
口腔科学 | 12篇 |
临床医学 | 52篇 |
内科学 | 130篇 |
神经病学 | 30篇 |
特种医学 | 6篇 |
外科学 | 92篇 |
综合类 | 2篇 |
一般理论 | 1篇 |
预防医学 | 73篇 |
眼科学 | 3篇 |
药学 | 66篇 |
中国医学 | 17篇 |
肿瘤学 | 64篇 |
出版年
2024年 | 2篇 |
2022年 | 2篇 |
2021年 | 10篇 |
2020年 | 9篇 |
2019年 | 10篇 |
2018年 | 13篇 |
2017年 | 15篇 |
2016年 | 15篇 |
2015年 | 17篇 |
2014年 | 20篇 |
2013年 | 32篇 |
2012年 | 27篇 |
2011年 | 38篇 |
2010年 | 24篇 |
2009年 | 32篇 |
2008年 | 46篇 |
2007年 | 34篇 |
2006年 | 37篇 |
2005年 | 32篇 |
2004年 | 25篇 |
2003年 | 30篇 |
2002年 | 19篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 5篇 |
1997年 | 12篇 |
1996年 | 8篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 5篇 |
1989年 | 2篇 |
1988年 | 9篇 |
1987年 | 2篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1984年 | 6篇 |
1983年 | 2篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 4篇 |
1979年 | 3篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1970年 | 2篇 |
1967年 | 5篇 |
1963年 | 2篇 |
排序方式: 共有629条查询结果,搜索用时 0 毫秒
101.
Patients experiencing several cancers can be a challenge, as optimal treatment options for the different cancers might interfere with each other. In this case report, we present a woman diagnosed with 4 different types of cancer. She was treated with surgery, chemotherapy and radiotherapy. Her performance status was generally good, and she tolerated the treatment very well, except some troublesome side effects in the thoracic soft tissue after stereotactic body radiotherapy.Key Words: Stereotactic body radiotherapy, Soft tissue reaction, Multiple malignancies 相似文献
102.
Vilde D Haakensen Margarethe Biong Ole Christian Lingj?rde Marit Muri Holmen Jan Ole Frantzen Ying Chen Dina Navjord Linda Romundstad Torben Lüders Ida K Bukholm Hiroko K Solvang Vessela N Kristensen Giske Ursin Anne-Lise B?rresen-Dale ?slaug Helland 《Breast cancer research : BCR》2010,12(4):R65
Introduction
Mammographic density (MD), as assessed from film screen mammograms, is determined by the relative content of adipose, connective and epithelial tissue in the female breast. In epidemiological studies, a high percentage of MD confers a four to six fold risk elevation of developing breast cancer, even after adjustment for other known breast cancer risk factors. However, the biologic correlates of density are little known.Methods
Gene expression analysis using whole genome arrays was performed on breast biopsies from 143 women; 79 women with no malignancy (healthy women) and 64 newly diagnosed breast cancer patients, both included from mammographic centres. Percent MD was determined using a previously validated, computerized method on scanned mammograms. Significance analysis of microarrays (SAM) was performed to identify genes influencing MD and a linear regression model was used to assess the independent contribution from different variables to MD.Results
SAM-analysis identified 24 genes differentially expressed between samples from breasts with high and low MD. These genes included three uridine 5''-diphospho-glucuronosyltransferase (UGT) genes and the oestrogen receptor gene (ESR1). These genes were down-regulated in samples with high MD compared to those with low MD. The UGT gene products, which are known to inactivate oestrogen metabolites, were also down-regulated in tumour samples compared to samples from healthy individuals. Several single nucleotide polymorphisms (SNPs) in the UGT genes associated with the expression of UGT and other genes in their vicinity were identified.Conclusions
Three UGT enzymes were lower expressed both in breast tissue biopsies from healthy women with high MD and in biopsies from newly diagnosed breast cancers. The association was strongest amongst young women and women using hormonal therapy. UGT2B10 predicts MD independently of age, hormone therapy and parity. Our results indicate that down-regulation of UGT genes in women exposed to female sex hormones is associated with high MD and might increase the risk of breast cancer. 相似文献103.
Background
It is well known that there is a social gradient in mental health, the prevalence of mental disorders stepwise increasing by lower social status. The reason for this, however, is not clear, and the purpose of the present study was to explore possible mediating factors between social status and mental health.Methods
The study has a cross-sectional design, and was based on a nationwide survey in Oslo, Norway, counting 12 310 people in the age of 30–60 years. Immigrants from non-western countries were excluded. Socio-demographic data were gathered from existing registers, whereas data on health, psychosocial variables and life style were gathered by structured interview. As indicator of mental health was used a 10-items version of Hopkins Symptom Checklist, measuring psychological distress. Measures of general self-efficacy and sense of powerlessness was used as indicators of control of own life situation.Results
A strong social gradient in mental health was found, the prevalence of psychological distress increasing by decreasing social status. Psychosocial factors, including self-efficacy, sense of powerlessness, control of work, social support and negative life events, in particular economic problems, as well as life style factors (physical exercise, BMI, smoking) and somatic health, likewise showed a social gradient, all risk factors increasing by decreasing social status. When adjusting for the risk factors in multivariate statistical analyses, the social gradient in mental health was eliminated. Low self-efficacy and sense of powerlessness emerged as important explanatory factors, alongside with poor social support, economic problems, smoking and somatic disorder.Conclusion
Both individual characteristics, supposedly linked to the personality, like low self-efficacy, and factors related to the actual life situation, like economic problems and a feeling of powerlessness, contribute to the social gradient in mental health, and both aspects should be addressed in preventive work.104.
105.
106.
Lil-Sofie Ording Muller Peter Boavida Derk Avenarius Beatrice Damasio Odd Petter Eldevik Clara Malattia Karen Lambot-Juhan Laura Tanturri Catherine M. Owens Karen Rosendahl 《Pediatric radiology》2013,43(7):785-795
Background
Bony depressions at the wrist resembling erosions are frequently seen on MRI in healthy children. The accuracy of MRI in detecting early bony destruction is therefore questionable. We compared findings on MRI of the wrist in healthy children and those with juvenile idiopathic arthritis (JIA) to investigate markers for true disease.Materials and methods
We compared the number and localisation of bony depressions at the wrist in 85 healthy children and 68 children with JIA, ages 5–15 years. The size of the wrist was assessed from a radiograph of the wrist performed on the same day as the MRI.Results
No significant difference in the number of bony depressions in the carpal bones was seen between healthy children and children with JIA at any age. Depressions are found in similar locations in the two groups, except for a few sites, where bony depressions were seen exclusively in the JIA group, particularly at the CMC joints. The wrist was significantly smaller in children with JIA (P < 0.001).Conclusions
Using adult scoring systems and standard MR sequences in the assessment of bone destruction in children may lead to overstaging or understaging of disease. At present, standard MRI sequences cannot easily be used for assessment of early signs of erosions in children. 相似文献107.
Krister W. Fjermestad Simen Stokke Gro Janne H. Wergeland Sarah Anticich Bente Storm Mowatt Haugland Odd E. Havik 《Children's Health Care》2013,42(1):40-53
Boys with sex chromosome aneuploidies (SCA) represent an understudied group. We examined parent-reported physical and socio-emotional problems in 25 boys with SCA (Mean age = 11.7 years, SD = 4.5). The majority had no severe physical health problems. One third of the sample had sleep problems and half of them had weekly or monthly pain. Total emotional and behavior problems, as assessed with the Strengths and Difficulties Questionnaire, were at the same level as reported for boys referred to child mental health clinics. Thus, boys with SCA may have the same need for psychological assessment and intervention as clinic-referred boys. 相似文献
108.
109.
Saelen MG Prøsch LK Gudmundsdottir H Dyrbekk D Helge Hunderi O Arnesen E Paulsen D Skjønsberg H Os I 《Blood pressure》2005,14(3):170-176
This study compared the use of antihypertensive treatment and blood pressure (BP) controls between patients with diabetic kidney disease (DK+) and patients with non-diabetic kidney disease (DK-) exhibiting moderate-to-severe chronic renal failure who did not need renal replacement therapy. A cross-sectional survey included all renal patients with s-creatinine at ?200 micromol/l attending regular control sessions at six renal units in Norway. Of the 351 patients included, 73 (20.8%) were DK+. The proportion reaching a BP goal of <130/80 mmHg was similar in DK+ and DK- (14.1% vs 13.6%, p = 0.92), while 38% and 39% achieved a BP of <140/90 mmHg, respectively. The systolic BP goal was more difficult to achieve than the diastolic BP goal in DK+ patients (35% vs 15%) despite a mean of three different types of drugs being used. Loop diuretics and beta-adrenergic-receptor antagonists were the most frequently prescribed drugs, and the use of angiotensin-converting enzyme inhibitors or angiotensin-II-receptor antagonists declined when renal function deteriorated, from 80% to 0% and from 66% to 20% in the DK+ and DK- groups, respectively (p = 0.001). Thus, despite the use of multiple antihypertensive drugs, controlling BP - especially the systolic BP - is difficult in high-risk patients with chronic renal failure caused by diabetic kidney disease. 相似文献
110.
Odd Carsten Koldsland Johan C. Wohlfahrt Anne M. Aass 《Journal of clinical periodontology》2018,45(1):100-113