全文获取类型
收费全文 | 189篇 |
免费 | 7篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 5篇 |
妇产科学 | 1篇 |
基础医学 | 12篇 |
口腔科学 | 2篇 |
临床医学 | 15篇 |
内科学 | 17篇 |
神经病学 | 9篇 |
特种医学 | 18篇 |
外科学 | 16篇 |
预防医学 | 33篇 |
眼科学 | 7篇 |
药学 | 9篇 |
肿瘤学 | 6篇 |
出版年
2023年 | 2篇 |
2022年 | 8篇 |
2021年 | 7篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 5篇 |
2015年 | 6篇 |
2014年 | 8篇 |
2013年 | 17篇 |
2012年 | 8篇 |
2011年 | 13篇 |
2010年 | 8篇 |
2009年 | 3篇 |
2008年 | 20篇 |
2007年 | 14篇 |
2006年 | 11篇 |
2005年 | 10篇 |
2003年 | 7篇 |
2002年 | 10篇 |
2001年 | 3篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1975年 | 2篇 |
1974年 | 3篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 4篇 |
1968年 | 1篇 |
排序方式: 共有196条查询结果,搜索用时 15 毫秒
51.
52.
Risk factors for work-related assaults on nurses 总被引:2,自引:0,他引:2
Gerberich SG Church TR McGovern PM Hansen H Nachreiner NM Geisser MS Ryan AD Mongin SJ Watt GD Jurek A 《Epidemiology (Cambridge, Mass.)》2005,16(5):704-709
BACKGROUND: Work-related homicides have been the subject of considerable study, but little is known about nonfatal violence and relevant risk factors. METHODS: We surveyed 6300 Minnesota nurses who were selected randomly from the 1998 licensing database and determined their employment and occupational violence experience. In a nested case-control study, we examined environmental exposures and physical assault. Cases of assault in the previous 12 months and controls randomly selected from assault-free months were surveyed about prior-month exposures. RESULTS: After adjustment by multiple logistic regression, incidence of physical assault was 13.2 per 100 persons per year (95% confidence interval = 12.2-14.3). Among 310 cases and 946 control subjects, odds ratios for assault were increased: in nursing homes or long-term care facilities (2.6; 1.9-3.6), emergency departments (4.2; 1.3-12.8), and psychiatric departments (2.0; 1.1-3.7); in environments not "bright as daylight" (2.2; 1.6-2.8); and for each additional hour of shift duration (1.05; 0.99-1.11). Risks were decreased when carrying cellular telephones or personal alarms (0.3; 0.2-0.7). CONCLUSIONS: These results may guide in-depth investigation of ways protective and risk factors can control violence against nurses. 相似文献
53.
Age,flight experience,and risk of crash involvement in a cohort of professional pilots 总被引:1,自引:0,他引:1
Li G Baker SP Grabowski JG Qiang Y McCarthy ML Rebok GW 《American journal of epidemiology》2003,157(10):874-880
Federal aviation regulations prohibit airline pilots from flying beyond the age of 60 years. However, the relation between pilot age and flight safety has not been rigorously assessed using empirical data. From 1987 to 1997, the authors followed a cohort of 3,306 commuter air carrier and air taxi pilots who were aged 45-54 years in 1987. During the follow-up period, the pilots accumulated a total of 12.9 million flight hours and 66 aviation crashes, yielding a rate of 5.1 crashes per million pilot flight hours. Crash risk remained fairly stable as the pilots aged from their late forties to their late fifties. Flight experience, as measured by total flight time at baseline, showed a significant protective effect against the risk of crash involvement. With adjustment for age, pilots who had 5,000-9,999 hours of total flight time at baseline had a 57% lower risk of a crash than their less experienced counterparts (relative risk = 0.43, 95% confidence interval: 0.21, 0.87). The protective effect of flight experience leveled off after total flight time reached 10,000 hours. The lack of an association between pilot age and crash risk may reflect a strong "healthy worker effect" stemming from the rigorous medical standards and periodic physical examinations required for professional pilots. 相似文献
54.
55.
56.
57.
58.
59.
60.
Jarosław Miłoński Krzysztof KuśmierczykPiotr Pietkiewicz Joanna Urbaniak Jurek Olszewski 《Otolaryngologia polska. The Polish otolaryngology》2014