全文获取类型
收费全文 | 1668篇 |
免费 | 128篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 31篇 |
儿科学 | 37篇 |
妇产科学 | 41篇 |
基础医学 | 182篇 |
口腔科学 | 22篇 |
临床医学 | 120篇 |
内科学 | 301篇 |
皮肤病学 | 29篇 |
神经病学 | 134篇 |
特种医学 | 50篇 |
外科学 | 263篇 |
综合类 | 20篇 |
一般理论 | 1篇 |
预防医学 | 127篇 |
眼科学 | 89篇 |
药学 | 86篇 |
中国医学 | 13篇 |
肿瘤学 | 255篇 |
出版年
2023年 | 23篇 |
2022年 | 16篇 |
2021年 | 85篇 |
2020年 | 58篇 |
2019年 | 77篇 |
2018年 | 95篇 |
2017年 | 56篇 |
2016年 | 87篇 |
2015年 | 63篇 |
2014年 | 74篇 |
2013年 | 81篇 |
2012年 | 141篇 |
2011年 | 148篇 |
2010年 | 62篇 |
2009年 | 63篇 |
2008年 | 83篇 |
2007年 | 92篇 |
2006年 | 83篇 |
2005年 | 64篇 |
2004年 | 58篇 |
2003年 | 51篇 |
2002年 | 53篇 |
2001年 | 17篇 |
2000年 | 29篇 |
1999年 | 22篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 7篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1992年 | 10篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 10篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1985年 | 3篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1975年 | 4篇 |
1974年 | 5篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1967年 | 2篇 |
1966年 | 4篇 |
1946年 | 1篇 |
1939年 | 1篇 |
1927年 | 1篇 |
1913年 | 2篇 |
排序方式: 共有1801条查询结果,搜索用时 15 毫秒
1.
Daniel Rohan Phadke Daniel P. Sheeran Luke R. Wilkins John A. Kern Margaret C. Tracci John F. Angle 《Journal of vascular and interventional radiology : JVIR》2019,30(4):572-577
Purpose
To characterize the degree of venous collateralization before and after endovascular therapy and determine the effect of collateralization on success of thrombolysis and rate of repeat intervention in patients with Paget–Schroetter syndrome.Materials and Methods
A single-center retrospective study of 37 extremities in 36 patients (mean age, 32.64 y; range, 15–72 y; 24 men) with PSS treated with endovascular therapy from 2007 through 2017 was conducted. Venograms at presentation, after lysis, postoperatively, and at each repeat intervention were graded for venous stenosis, thrombus burden, and collateralization on a 5-point scale. Collateralization was classified as high-grade (9 extremities) or low-grade (28 extremities) based on grading of the venograms at presentation.Results
Primary technical success rate for endovascular treatment was 100%. Eighty-six percent of patients (32 of 37) underwent thrombolysis, 91% (34 of 37) underwent mechanical thrombectomy, and 83% (30 of 37) underwent balloon angioplasty. Overall primary patency rate was 50% at 12 months. The repeat intervention rate within 12 months was significantly higher for extremities with high- vs low-grade collateralization (89% vs 43%; P = .016). There was a significant decrease in the median grade of collateral severity after initial intervention (2 vs 1; P = .044) and 1 day postoperatively (2 vs 1; P = .040) vs the venogram at presentation.Conclusions
Severity of venous collateralization on the venogram at presentation of patients with PSS does not appear to affect success of endovascular therapy but may predict long-term patency of affected extremities. Patients in this cohort with severe collateralization on presentation were more likely to need repeat intervention. 相似文献2.
3.
4.
Katie Magoon Claire Beamish Nadia Dowshen Aletha Akers 《Journal of pediatric and adolescent gynecology》2019,32(6):612-614
Study ObjectiveLong-acting reversible contraceptives (LARCs) are the most effective form of pregnancy prevention for sexually active adolescents, yet usage rates are low. The Affordable Care Act (ACA) mandated insurers cover LARCs without cost-sharing. Compliance with this policy is not well documented. This study assessed LARC coverage by insurers in a large pediatric health system.Design, Setting, Participants, and InterventionsBetween June and August 2016, LARC coverage was assessed through content reviews of insurance Web sites, formularies, and summaries of benefits for all Pennsylvania Medicaid plans and the top 20 commercial insurers for a large pediatric health system.Main Outcome MeasuresThe primary outcome was adherence to the ACA mandate for LARC coverage without cost-sharing.ResultsAmong the 37 plans (17 public, 20 private), 21 (56.8%) were adherent and 16 (43.2%) were nonadherent. Among nonadherent plans, 3 plans covered LARC services but required cost-sharing, whereas 13 did not cover LARC services at all. There was not a statistically significant difference in LARC coverage between public and private plans.ConclusionDespite the landmark ACA mandate, insurance coverage of LARCs in pediatric hospitals is low for young women among private and public insurers. Insurer failure to adhere to the ACA among pediatric patients represents a barrier to LARC access for those at high risk of unintended pregnancy. 相似文献
5.
Juhua Luo Xiwei Chen JoAnn E. Manson Aladdin H. Shadyab Jean Wactawski-Wende Mara Vitolins Thomas E. Rohan Ting-Yuan D. Cheng Zhenzhen Zhang Lihong Qi Michael Hendryx 《International journal of cancer. Journal international du cancer》2020,147(1):65-75
Breast cancer has been suggested to potentially have prenatal origins. We examined associations between birth weight, body mass index (BMI) at four-time points over 25 years of adulthood, and risk of postmenopausal breast cancer, with emphasis on whether the association between birth weight and risk of breast cancer was mediated by weight and height changes over the adult life course. Postmenopausal women (n = 70,397) aged 50–79 years without breast cancer at enrollment (1993–1998) were followed up to 25 years. Weight and height were measured at baseline. Birth weight, and weights at ages 18, 35 and 50 were self-reported. Breast cancer cases were centrally adjudicated. Compared to women with birth weight of 6–8 pounds, women with birth weight of <6 pounds had lower risk of breast cancer (HR = 0.88 95% CI: 0.79–0.99). 44% and 21% of the relationship between birth weight and breast cancer risk was mediated by adult height and weight at baseline, respectively. Birth weight of 8 pounds or more was not associated with risk of postmenopausal breast cancer. Weight gain in adulthood was associated with increased risk of breast cancer regardless of time periods. In conclusion, lower birthweight was associated with lower risk of postmenopausal breast cancer, and this reduction in risk was significantly mediated by childhood or adolescent growth, especially by adult height. Our data suggest that reaching and maintaining a healthy weight during adulthood is key in the prevention of breast cancer. 相似文献
6.
Krishnakumar S. Kuris Snehalatha Kaveri Rachana Joshi Aditi Krishnakumar Rohan 《Journal of obstetrics and gynaecology of India》2020,70(3):237-239
The Journal of Obstetrics and Gynecology of India - 相似文献
7.
Cognitive Therapy and Research - First-line treatments for winter seasonal affective disorder include light therapy and cognitive-behavioral therapy; however, it is unclear whether particular... 相似文献
8.
9.
10.
Referrals to dietitians/nutritionists: A cross‐sectional analysis of Australian GP registrars’ clinical practice 下载免费PDF全文
Katie J. Mulquiney Amanda Tapley Mieke L. van Driel Simon Morgan Andrew R. Davey Kim M. Henderson Neil A. Spike Rohan H. Kerr Jane F. Watson Nigel F. Catzikiris Parker J. Magin 《Nutrition & Dietetics》2018,75(1):98-105