全文获取类型
收费全文 | 412篇 |
免费 | 30篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 8篇 |
妇产科学 | 23篇 |
基础医学 | 26篇 |
口腔科学 | 1篇 |
临床医学 | 38篇 |
内科学 | 26篇 |
皮肤病学 | 1篇 |
神经病学 | 25篇 |
特种医学 | 6篇 |
外科学 | 10篇 |
综合类 | 51篇 |
一般理论 | 1篇 |
预防医学 | 165篇 |
眼科学 | 1篇 |
药学 | 44篇 |
2篇 | |
中国医学 | 8篇 |
肿瘤学 | 7篇 |
出版年
2023年 | 11篇 |
2022年 | 12篇 |
2021年 | 21篇 |
2020年 | 21篇 |
2019年 | 16篇 |
2018年 | 15篇 |
2017年 | 15篇 |
2016年 | 7篇 |
2015年 | 10篇 |
2014年 | 33篇 |
2013年 | 44篇 |
2012年 | 29篇 |
2011年 | 36篇 |
2010年 | 22篇 |
2009年 | 19篇 |
2008年 | 11篇 |
2007年 | 19篇 |
2006年 | 23篇 |
2005年 | 9篇 |
2004年 | 9篇 |
2003年 | 8篇 |
2002年 | 8篇 |
2001年 | 6篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 3篇 |
1987年 | 2篇 |
1983年 | 1篇 |
排序方式: 共有444条查询结果,搜索用时 781 毫秒
61.
62.
《Vaccine》2019,37(32):4587-4593
ObjectiveThe objective of the present study was to investigate the risk factors for intussusception (IS) among infants, including vaccination against rotavirus.MethodsCase-control study with systematic inclusion of all infants aged <1 year with suspected IS admitted to emergency departments in the eastern region of France between 1 April 2008 and 31 March 2012. All cases classed level 1 according to the Brighton classification were matched to 4 hospital controls. Two exposure windows were examined; exposure to the first dose of rotavirus vaccine in the 7 and in the 14 days prior to the occurrence of IS.ResultsA total of 115 cases were matched with 457 controls. The average vaccination coverage rate over the 4 years of study was 8.6%. Rotavirus vaccine was not found to be significantly associated with the occurrence of IS in the 7 days (odds ratio (OR) not calculated; p = 0.99) and in the 14 days after administration of one dose vaccine (OR 1.33, 95% confidence interval (CI) 0.14–12.82). Infant formula alone or combined with breastfeeding was associated with an excess risk of IS (OR 2.74, 95% CI 1.10–6.79). A history of gastroenteritis within 2 weeks prior to hospitalisation was also associated with an increased risk (OR 2.24, 95% CI 1.07–4.67).ConclusionOur study indicates that infant formula alone or combined with breastfeeding is a risk factor for IS. A small, non-significant increase in the risk of IS was observed after rotavirus vaccination, although the low vaccine coverage rate likely precluded detection of a significant increase in risk. 相似文献
63.
64.
65.
Objective
To determine the value of completing a pharmacy resident teaching certificate program on graduates'' current positions of employment.Design
Annually from 2003 to 2007, program graduates of the Indiana Pharmacy Teaching Certificate (IPTeC) program were invited to take a 13-question Web-based survey 1 year after completing the program.Assessment
Fifty-three of the 62 graduates (85%) surveyed responded. Almost half of the respondents strongly agreed or agreed that having completed the IPTeC program helped them obtain their current position. More than 90% of respondents agreed or strongly agreed that the seminar participation and teaching experience from the IPTeC program helped them in their current position. About 80% of respondents would recommend the program to others.Conclusion
Completing a pharmacy resident teaching certificate program helped some graduates obtain and excel in their current position. 相似文献66.
67.
Srmena Krstev Dalsu Baris Patricia A. Stewart Richard B. Hayes Aaron Blair Mustafa Dosemeci 《American journal of industrial medicine》1998,34(5):413-420
Current knowledge of the etiology of prostate cancer is limited. Numerous studies have suggested that certain occupations and industries may be associated with the occurrence of prostate cancer. Information on occupation and industry on death certificates from 24 states gathered from 1984 to 1993 was used in case control study on prostate cancer. A total of 60,878 men with prostate cancer as underlying cause of death was selected and matched with controls who died of all other causes except cancer. Similar to the findings of our parallel large case control study of prostate cancer, we observed excess risks in some white-collar occupations, such as administrators, managers, teachers, engineers, and sales occupations. However, some blue-collar occupations, such as power plant operators and stationary engineers, brickmasons, machinery maintenance workers, airplane pilots, longshoreman, railroad industry workers, and other occupations with potential exposure to PAH also showed risk of excess prostate cancer. Risk was significantly decreased for blue-collar occupations, including farm workers, commercial fishermen, mechanics and repairers, structural metal workers, mining, printing, winding, dry cleaning, textile machine operators, cooks, bakers, and bartenders. Although we observed excess risks of prostate cancer among some low socioeconomic status (SES) occupations, the overall results suggest that the effects of higher SES cannot be ruled out in associations between occupational factors and the risk of prostate cancer. Am. J. Ind. Med. 34:413–420, 1998. © 1998 Wiley-Liss, Inc. 相似文献
68.
69.
70.