全文获取类型
收费全文 | 2628篇 |
免费 | 164篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 40篇 |
妇产科学 | 83篇 |
基础医学 | 344篇 |
口腔科学 | 177篇 |
临床医学 | 201篇 |
内科学 | 630篇 |
皮肤病学 | 106篇 |
神经病学 | 166篇 |
特种医学 | 30篇 |
外科学 | 378篇 |
综合类 | 26篇 |
预防医学 | 220篇 |
眼科学 | 35篇 |
药学 | 162篇 |
中国医学 | 14篇 |
肿瘤学 | 176篇 |
出版年
2023年 | 21篇 |
2022年 | 31篇 |
2021年 | 98篇 |
2020年 | 48篇 |
2019年 | 70篇 |
2018年 | 86篇 |
2017年 | 68篇 |
2016年 | 48篇 |
2015年 | 75篇 |
2014年 | 126篇 |
2013年 | 119篇 |
2012年 | 225篇 |
2011年 | 234篇 |
2010年 | 135篇 |
2009年 | 113篇 |
2008年 | 210篇 |
2007年 | 197篇 |
2006年 | 165篇 |
2005年 | 145篇 |
2004年 | 162篇 |
2003年 | 123篇 |
2002年 | 126篇 |
2001年 | 16篇 |
2000年 | 10篇 |
1999年 | 15篇 |
1998年 | 14篇 |
1997年 | 27篇 |
1996年 | 14篇 |
1995年 | 10篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 9篇 |
1991年 | 5篇 |
1990年 | 3篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1979年 | 3篇 |
1976年 | 4篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1944年 | 2篇 |
1934年 | 1篇 |
排序方式: 共有2816条查询结果,搜索用时 281 毫秒
121.
Franz H. Messerli Louis B. Glade Hector O. Ventura Gerald R. Dreslinski Daniel H. Suarez Allan A. MacPhee Gerardo G. Aristimuno Francis E. Cole Edward D. Frohlich 《American heart journal》1982,104(1):109-114
Ambulatory continuous ECG and arterial pressure (BP) were recorded simultaneously (Delmar Avionics Pressurometer II) for 24 hours in 13 age-matched normotensive subjects, 11 patients with borderline hypertension (HBP), and in 10 patients with uncomplicated established essential HBP. Urinary concentrations of epinephrine, norepinephrine, and dopamine were simultaneously collected over four successive 4-hour periods and one 8-hour period. Prevalence and total number of ventricular and supraventricular ectopic beats was low and not affected by arterial BP. Twenty-four-hour heart rate (HR) and 4-hourly excretion of epinephrine, norepinephrine, and dopamine were comparable between normotensive and HBP persons and no correlation between urinary catecholamines and arterial BP (systolic, diastolic, or mean), HR, or prevalence of ectopic beats was found in any of the three groups or in the total study population. We conclude that HBP patients without ECG evidence of left ventricular hypertrophy do not have a higher prevalence of supraventricular or ventricular ectopic beats. Urinary catecholamines are not related to circadian fluctuations or variability in arterial BP, HR, or prevalence of ectopic beats. 相似文献
122.
123.
Gonzalez-Gay MA Rubiera G Piñeiro A Garcia-Porrua C Pego-Reigosa R Gonzalez-Juanatey C Sanchez-Andrade A Llorca J 《The Journal of rheumatology》2005,32(3):502-506
OBJECTIVE: To assess the incidence, mortality, and predictors of ischemic heart disease (IHD) in patients from the Lugo region of Northwest Spain with biopsy-proven giant cell arteritis (GCA). METHODS: Retrospective study of patients with biopsy-proven GCA diagnosed from 1981 to 2001 at the single hospital for a population of 250,000 people. A survival analysis was performed. Hazard ratios and standardized mortality ratio (SMR) as well as predictors of IHD in patients with biopsy-proven GCA were also assessed. RESULTS: Nineteen (9%) of the 210 patients with biopsy-proven GCA diagnosed during the period of study had IHD. The incidence of IHD in patients with GCA was 12.6/1000 person-years at risk (95% CI 6.9-21.0). During the study period 1981-2000 the population aged > or = 50 years in Lugo was roughly 100,000, and the mortality rate due to IHD in patients with GCA for that population was 8/100,000. The SMR in patients with GCA due to IHD was 1.62 (95% CI 0.70-3.20). Mortality in patients with GCA who had IHD was higher than in those patients without IHD (age and sex adjusted hazard ratio 2.81, 95% CI 1.51-5.21; p = 0.001). Age (hazard ratio 1.15), hypertension (hazard ratio 2.51), and abnormal temporal artery on physical examination (hazard ratio 0.36) at the time of diagnosis of GCA were the best predictors of IHD over the followup period in patients with biopsy-proven GCA. CONCLUSION: Our observations suggest that mortality due to IHD in patients from Lugo with GCA is not much higher than that reported in the Spanish population aged 50 years and older. However, mortality in patients with GCA with IHD is higher than in GCA patients without IHD. 相似文献
124.
125.
126.
127.
128.
129.
130.
Hélène Louis-Dit-Picard Ilektra Kouranti Chloé Rafael Irmine Loisel-Ferreira Maria Chavez-Canales Waed Abdel-Khalek Eduardo R. Argaiz Stéphanie Baron Sarah Vacle Tiffany Migeon Richard Coleman Marcio Do Cruzeiro Marguerite Hureaux Nirubiah Thurairajasingam Stéphane Decramer Xavier Girerd Kevin O’Shaugnessy Paolo Mulatero Gwena?lle Roussey Ivan Tack Robert Unwin Rosa Vargas-Poussou Olivier Staub Richard Grimm Paul A. Welling Gerardo Gamba Eric Clauser Juliette Hadchouel Xavier Jeunemaitre 《The Journal of clinical investigation》2020,130(12):6379