收费全文 | 3219篇 |
免费 | 238篇 |
国内免费 | 11篇 |
耳鼻咽喉 | 37篇 |
儿科学 | 91篇 |
妇产科学 | 71篇 |
基础医学 | 446篇 |
口腔科学 | 72篇 |
临床医学 | 305篇 |
内科学 | 633篇 |
皮肤病学 | 79篇 |
神经病学 | 355篇 |
特种医学 | 53篇 |
外科学 | 383篇 |
综合类 | 24篇 |
一般理论 | 1篇 |
预防医学 | 436篇 |
眼科学 | 65篇 |
药学 | 195篇 |
中国医学 | 18篇 |
肿瘤学 | 204篇 |
2024年 | 12篇 |
2023年 | 73篇 |
2022年 | 123篇 |
2021年 | 236篇 |
2020年 | 150篇 |
2019年 | 160篇 |
2018年 | 183篇 |
2017年 | 107篇 |
2016年 | 112篇 |
2015年 | 102篇 |
2014年 | 146篇 |
2013年 | 175篇 |
2012年 | 259篇 |
2011年 | 266篇 |
2010年 | 150篇 |
2009年 | 117篇 |
2008年 | 177篇 |
2007年 | 169篇 |
2006年 | 157篇 |
2005年 | 135篇 |
2004年 | 126篇 |
2003年 | 88篇 |
2002年 | 66篇 |
2001年 | 17篇 |
2000年 | 19篇 |
1999年 | 13篇 |
1998年 | 13篇 |
1997年 | 12篇 |
1996年 | 12篇 |
1995年 | 13篇 |
1994年 | 3篇 |
1993年 | 10篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1990年 | 10篇 |
1989年 | 10篇 |
1988年 | 5篇 |
1987年 | 8篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1975年 | 2篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1937年 | 1篇 |
1928年 | 1篇 |
Purpose
This study investigated the possibility of K469E (rs5498) and G241R (rs1799969) polymorphisms, in ICAM-1 gene, and G634C (rs1800796), in IL-6 gene, being associated with the occurrence of endometriosis in a sample of Brazilian women.Methods
We genotyped 200 women (100 in control group and 100 in endometriosis group) by PCR-RFLP technique for G634C, K469E, and G241R polymorphisms.Results
No significant difference was observed in genotypic frequency between control and endometriosis groups for G634C and K469E polymorphisms (p?=?0.61 and p?=?0.22, respectively). In addition, no significant difference between stages I-II and III-IV of the disease was found for both SNPs (p?=?0.63 and p?=?0.24, respectively). All individuals were wild homozygotes for G241R polymorphism.Conclusion
This study suggests that polymorphisms K469E, G241R, and G634C are not associated with increased susceptibility to endometriosis in Brazilian women.![点击此处可从《Paediatric anaesthesia》网站下载免费的PDF全文](/ch/ext_images/free.gif)
![点击此处可从《Nutrition & Dietetics》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Aim
Nutritional screening may not always lead to intervention. The present study aimed to determine: (i) the rate of nutritional screening in hospitalised older adults; (ii) whether nutritional screening led to dietitian consultation and (iii) factors associated with malnutrition.Methods
In this prospective study of patients aged ≥70 years admitted to a Geriatric Evaluation and Management Unit (GEMU), malnutrition was screened for using the Mini Nutritional Assessment Short Form (MNA‐SF) and identified using the Mini Nutritional Assessment (MNA).Results
Of the 172 patients participating in the study, 53 (30.8%) patients were malnourished, and 84 (48.8%) were at risk of malnutrition. Mean (SD) age was 85.2 (6.4 years), with 131 patients (76.2%) female. Nutritional screening was performed for all patients; however, it was incomplete in 59 (34.3%) because of omission of the anthropometric measurement. Overall, 62 (36.0%) of the total number of patients were seen by the dietitian, which included 26 (49%) of malnourished patients, 27 (32%) of at‐risk patients and 9 (26%) of the well‐nourished patients. No patients lost >1% of body weight during GEMU stay. Malnourished patients were more likely to be frail, have poor appetite, depression, and have lower levels of: albumin, cognition, physical function, grip strength and quality of life.Conclusions
The full benefits of nutritional screening by MNA‐SF may not be realised if it does not result in malnourished patients receiving a dietitian consultation. However, it is possible that enrichment of the foodservice with high protein/high‐energy options minimised patient weight loss in the GEMU. 相似文献Areas covered: In this systematic review, the authors give a broad overview of the pharmacological therapy available for SAD. Also, nutritional substances fitting well with the postulated hypotheses are reviewed for the treatment and prevention of SAD. There is a specific focus on the quality of the currently performed studies.
Expert opinion: Light therapy and fluoxetine are the only proven and effective acute treatment options for SAD, while bupropion is the only registered drug for prevention of SAD. This area of research is in dire need of valid large-scale and sufficiently reproducible randomized control trials. 相似文献