全文获取类型
收费全文 | 1888篇 |
免费 | 208篇 |
国内免费 | 50篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 106篇 |
妇产科学 | 47篇 |
基础医学 | 283篇 |
口腔科学 | 48篇 |
临床医学 | 172篇 |
内科学 | 481篇 |
皮肤病学 | 47篇 |
神经病学 | 114篇 |
特种医学 | 236篇 |
外科学 | 132篇 |
综合类 | 107篇 |
预防医学 | 119篇 |
眼科学 | 22篇 |
药学 | 117篇 |
中国医学 | 5篇 |
肿瘤学 | 74篇 |
出版年
2023年 | 20篇 |
2022年 | 15篇 |
2021年 | 36篇 |
2020年 | 25篇 |
2019年 | 18篇 |
2018年 | 31篇 |
2017年 | 50篇 |
2016年 | 48篇 |
2015年 | 37篇 |
2014年 | 77篇 |
2013年 | 94篇 |
2012年 | 57篇 |
2011年 | 50篇 |
2010年 | 81篇 |
2009年 | 84篇 |
2008年 | 67篇 |
2007年 | 112篇 |
2006年 | 68篇 |
2005年 | 59篇 |
2004年 | 48篇 |
2003年 | 41篇 |
2002年 | 33篇 |
2001年 | 60篇 |
2000年 | 38篇 |
1999年 | 32篇 |
1998年 | 91篇 |
1997年 | 69篇 |
1996年 | 70篇 |
1995年 | 54篇 |
1994年 | 51篇 |
1993年 | 47篇 |
1992年 | 18篇 |
1991年 | 20篇 |
1990年 | 31篇 |
1989年 | 25篇 |
1988年 | 25篇 |
1987年 | 24篇 |
1986年 | 24篇 |
1985年 | 25篇 |
1984年 | 19篇 |
1983年 | 20篇 |
1982年 | 11篇 |
1978年 | 16篇 |
1977年 | 13篇 |
1976年 | 17篇 |
1975年 | 27篇 |
1974年 | 12篇 |
1973年 | 11篇 |
1972年 | 11篇 |
1912年 | 10篇 |
排序方式: 共有2146条查询结果,搜索用时 15 毫秒
101.
102.
Lisa G. Suter MD Shu-Xia Li PhD Jacqueline N. Grady MS Zhenqiu Lin PhD Yongfei Wang MS Kanchana R. Bhat MPH Dima Turkmani DrPH MBA Steven B. Spivack MPH Peter K. Lindenauer MD MSc Angela R. Merrill PhD Elizabeth E. Drye MD SM Harlan M. Krumholz MD SM Susannah M. Bernheim MD MHS 《Journal of general internal medicine》2014,29(10):1333-1340
BACKGROUND
The Centers for Medicare & Medicaid Services publicly reports risk-standardized mortality rates (RSMRs) within 30-days of admission and, in 2013, risk-standardized unplanned readmission rates (RSRRs) within 30-days of discharge for patients hospitalized with acute myocardial infarction (AMI), heart failure (HF), and pneumonia. Current publicly reported data do not focus on variation in national results or annual changes.OBJECTIVE
Describe U.S. hospital performance on AMI, HF, and pneumonia mortality and updated readmission measures to provide perspective on national performance variation.DESIGN
To identify recent changes and variation in national hospital-level mortality and readmission for AMI, HF, and pneumonia, we performed cross-sectional panel analyses of national hospital performance on publicly reported measures.PARTICIPANTS
Fee-for-service Medicare and Veterans Health Administration beneficiaries, 65 years or older, hospitalized with principal discharge diagnoses of AMI, HF, or pneumonia between July 2009 and June 2012. RSMRs/RSRRs were calculated using hierarchical logistic models risk-adjusted for age, sex, comorbidities, and patients’ clustering among hospitals.Results
Median (range) RSMRs for AMI, HF, and pneumonia were 15.1% (9.4–21.0%), 11.3% (6.4–17.9%), and 11.4% (6.5–24.5%), respectively. Median (range) RSRRs for AMI, HF, and pneumonia were 18.2% (14.4–24.3%), 22.9% (17.1–30.7%), and 17.5% (13.6–24.0%), respectively. Median RSMRs declined for AMI (15.5% in 2009–2010, 15.4% in 2010–2011, 14.7% in 2011–2012) and remained similar for HF (11.5% in 2009–2010, 11.9% in 2010–2011, 11.7% in 2011–2012) and pneumonia (11.8% in 2009–2010, 11.9% in 2010–2011, 11.6% in 2011–2012). Median hospital-level RSRRs declined: AMI (18.5% in 2009–2010, 18.5% in 2010–2011, 17.7% in 2011–2012), HF (23.3% in 2009–2010, 23.1% in 2010–2011, 22.5% in 2011–2012), and pneumonia (17.7% in 2009–2010, 17.6% in 2010–2011, 17.3% in 2011–2012).Conclusions
We report the first national unplanned readmission results demonstrating declining rates for all three conditions between 2009–2012. Simultaneously, AMI mortality continued to decline, pneumonia mortality was stable, and HF mortality experienced a small increase. 相似文献103.
Holly C. Gooding MD MS Shannon McGinty MD Tracy K. Richmond MD MPH Matthew W. Gillman MD SM Alison E. Field ScD 《Journal of general internal medicine》2014,29(8):1098-1104
BACKGROUND
Young adults are less likely than older adults to be aware they have hypertension or to be treated for hypertension.OBJECTIVE
To describe rates of hypertension awareness and control in a cohort of young adults and understand the impact of health insurance, utilization of preventive care, and self-perception of health on rates of hypertension awareness and control in this age group.DESIGN AND PARTICIPANTS
Cross-sectional study of 13,512 young adults participating in Wave IV of the National Longitudinal Study of Adolescent Health in 2007–2008.MAIN MEASURES
We defined hypertension as an average of two measured systolic blood pressures (SBP) ≥ 140 mmHg, diastolic blood pressures (DBP) ≥ 90 mmHg, or self-report of hypertension. We defined hypertension awareness as reporting having been told by a health care provider that one had high blood pressure, and assessed awareness among those with uncontrolled hypertension. We considered those aware of having hypertension controlled if their average measured SBP was < 140 mmHg and DBP was < 90 mmHg.KEY RESULTS
Of the 3,303 young adults with hypertension, 2,531 (76 %) were uncontrolled, and 1,893 (75 %) of those with uncontrolled hypertension were unaware they had hypertension. After adjustment for age, sex, race/ethnicity, weight status, income, education, alcohol and tobacco use, young adults with uncontrolled hypertension who had (vs. didn’t have) routine preventive care in the past 2 years were 2.4 times more likely (95 % confidence interval [CI] 1.68–3.55) to be aware, but young adults who believed they were in excellent (vs. less than excellent) health were 64 % less likely to be aware they had hypertension (OR 0.36, 95 % CI 0.23–0.57). Neither preventive care utilization nor self-rated health was associated with blood pressure control.CONCLUSIONS
In this nationally representative group of young adults, rates of hypertension awareness and control were low. Efforts to increase detection of hypertension must address young adults’ access to preventive care and perception of their need for care. 相似文献104.
Infant oral mutilation is the practice of removing developing tooth germs, commonly the mandibular canine, in infants up to the age of 1 year. Subsequent complications include missing, impacted or hypoplastic permanent anterior and canine teeth. We report on a case of bilaterally missing lower canines thought to be due to infant oral mutilation. It is important that general dental practitioners are aware of this practice and resulting complications when treating families from sub‐Saharan East Africa. 相似文献
105.
106.
107.
Mateja Smogavec Maria Gerykova Bujalkova Reinhard Lehner Jürgen Neesen Jana Behunova Gülen Yerlikaya-Schatten Theresa Reischer Reinhard Altmann Denisa Weis Hans-Christoph Duba Franco Laccone 《European journal of human genetics : EJHG》2022,30(4):428
Exome sequencing has been increasingly implemented in prenatal genetic testing for fetuses with morphological abnormalities but normal rapid aneuploidy detection and microarray analysis. We present a retrospective study of 90 fetuses with different abnormal ultrasound findings, in which we employed the singleton exome sequencing (sES; 75 fetuses) or to a lesser extent (15 fetuses) a multigene panel analysis of 6713 genes as a primary tool for the detection of monogenic diseases. The detection rate of pathogenic or likely pathogenic variants in this study was 34.4%. The highest diagnostic rate of 56% was in fetuses with multiple anomalies, followed by cases with skeletal or renal abnormalities (diagnostic rate of 50%, respectively). We report 20 novel disease-causing variants in different known disease-associated genes and new genotype–phenotype associations for the genes KMT2D, MN1, CDK10, and EXOC3L2. Based on our data, we postulate that sES of fetal index cases with a concurrent sampling of parental probes for targeted testing of the origin of detected fetal variants could be a suitable tool to obtain reliable and rapid prenatal results, particularly in situations where a trio analysis is not possible.Subject terms: Genetics research, Disease genetics 相似文献
108.
Gene Yong-Kwang Ong Nicola Ngiam Lai Peng Tham Yee Hui Mok Jacqueline SM Ong Khai Pin Lee Sashikumar Ganapathy Shu-Ling Chong Jen Heng Pek Su Yah Chew Yang Chern Lim Germac Qiaoyue Shen Jade Kua Josephine Tan Kee Chong Ng 《Singapore medical journal》2021,62(8):372
We present the 2021 Singapore Paediatric Resuscitation Guidelines. The International Liaison Committee on Resuscitation’s Pediatric Taskforce Consensus Statements on Science and Treatment Recommendations, which was published in October 2020, and the updated resuscitation guidelines from the American Heart Association and European Resuscitation Council, were reviewed and discussed by the committee. These recommendations were derived after deliberation of peer-reviewed evidence updates on paediatric resuscitation and took into consideration the local setting and clinical practice. 相似文献
109.
目的:肺癌分期与肿瘤直径的关系已被证实是一个预后指标,因此被纳入1986年肺癌分类的国际系统。近年来由于CT飞速发展,人们可以诊断出更小的肺癌,于是有人提倡对肺癌Ⅰ期进一步分期,即根据肿瘤直径小于还是大于30mm,将无确切远处淋巴结转移的病例(Ⅰ期病例)细分为Ⅰa和Ⅰb期。在诊断无症状(即潜伏)的肺癌时,CT普查的开展使人们考虑肿瘤大小的预后价值。在此我们对CT普查诊断的无症状潜伏型肺癌作了分期与大小关系的报道。 相似文献
110.