全文获取类型
收费全文 | 3800篇 |
免费 | 317篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 47篇 |
儿科学 | 82篇 |
妇产科学 | 134篇 |
基础医学 | 432篇 |
口腔科学 | 52篇 |
临床医学 | 411篇 |
内科学 | 868篇 |
皮肤病学 | 55篇 |
神经病学 | 322篇 |
特种医学 | 56篇 |
外国民族医学 | 1篇 |
外科学 | 571篇 |
综合类 | 31篇 |
一般理论 | 1篇 |
预防医学 | 250篇 |
眼科学 | 196篇 |
药学 | 161篇 |
中国医学 | 2篇 |
肿瘤学 | 459篇 |
出版年
2022年 | 34篇 |
2021年 | 66篇 |
2020年 | 55篇 |
2019年 | 67篇 |
2018年 | 63篇 |
2017年 | 62篇 |
2016年 | 64篇 |
2015年 | 78篇 |
2014年 | 92篇 |
2013年 | 118篇 |
2012年 | 182篇 |
2011年 | 196篇 |
2010年 | 106篇 |
2009年 | 86篇 |
2008年 | 181篇 |
2007年 | 188篇 |
2006年 | 180篇 |
2005年 | 180篇 |
2004年 | 166篇 |
2003年 | 186篇 |
2002年 | 170篇 |
2001年 | 127篇 |
2000年 | 135篇 |
1999年 | 127篇 |
1998年 | 47篇 |
1997年 | 35篇 |
1996年 | 26篇 |
1995年 | 25篇 |
1994年 | 30篇 |
1993年 | 29篇 |
1992年 | 77篇 |
1991年 | 82篇 |
1990年 | 75篇 |
1989年 | 69篇 |
1988年 | 68篇 |
1987年 | 51篇 |
1986年 | 46篇 |
1985年 | 48篇 |
1984年 | 41篇 |
1983年 | 29篇 |
1982年 | 41篇 |
1981年 | 30篇 |
1979年 | 31篇 |
1978年 | 20篇 |
1977年 | 30篇 |
1975年 | 19篇 |
1974年 | 26篇 |
1973年 | 33篇 |
1972年 | 30篇 |
1969年 | 31篇 |
排序方式: 共有4131条查询结果,搜索用时 15 毫秒
81.
Inbal Samuk Akin Tekin Panagiotis Tryphonopoulos Ignacio G. Pinto Jennifer Garcia Debbie Weppler David M. Levi Seigo Nishida Gennaro Selvaggi Phillip Ruiz Andreas G. Tzakis Rodrigo Vianna 《Pediatric surgery international》2016,32(4):337-346
Purpose
To present our experience in abdominal transplantations to manage unresectable abdominal neoplasms in children and to describe the role of extensive surgeries in such cases.Methods
This is a retrospective study of 22 abdominal transplantations in 21 patients for abdominal tumors over 16 years. Transplantation techniques included liver transplant (LT), multivisceral transplant (MVTx), and intestinal autotransplant (IA). Follow-up intervals ranged from 0.3 to 168 months (median 20 months).Results
LT alone was performed in 15 patients for primary malignant (11) and benign (4) liver tumors. Pathological classification included HB hepatoblastoma (6), HCC hepatocellular cancer (3), hepatic epithelioid hemangioendothelioma HEH (1), angiosarcoma (1), benign vascular tumors (3), and adenoma (1). IA was performed in four patients for lesions involving the root of the mesentery; tumors of the head of pancreas (3) and mesenteric hemangioma (1). MVTx was performed in 2 patients for malignancies; pancreaticoblastoma (1), recurrent hepatoblastoma (1), and in one patient as a rescue procedure after IA failure. Four of the eleven patients who underwent LT for malignant liver tumor had metastatic disease at presentation. Six of them died of recurrent neoplasm (3), transplant-related complications (2), and underlying disease (1). All LT patients who had benign tumors are alive with functioning grafts. All IA patients survived and are on an oral diet, with one patient requiring TPN supplementation. One of the three patients who underwent MVTx died of metastatic disease.Conclusions
Allo/auto transplantation for abdominal tumors is a valuable modality when conventional treatments fail or are not feasible.82.
Effectiveness of a red cell antigen‐matching transfusion protocol in sickle cell disease patients 下载免费PDF全文
83.
Translational treatment paradigm for managing non‐unions secondary to radiation injury utilizing adipose derived stem cells and angiogenic therapy 下载免费PDF全文
Alexis Donneys MD MS Jordan T. Blough BS Noah S. Nelson BS Joseph E. Perosky MS Sagar S. Deshpande BS Stephen Y. Kang MD Peter A. Felice MD Christian Figueredo BS Jonathan R. Peterson BS Kenneth M. Kozloff PhD Benjamin Levi MD Douglas B. Chepeha MD Steven R. Buchman MD 《Head & neck》2016,38(Z1):E837-E843
84.
Gabriel de la Garza MD Oleg Militsakh MD Aru Panwar MD Tabitha L. Galloway MD Jeffrey B. Jorgensen MD Levi G. Ledgerwood MD Katelyn Kaiser MHSA Collin Kitzerow BS Yelizaveta Shnayder MD Colin A. Neumann MD Samir S. Khariwala MD MS W. Chad Spanos MD Nitin A. Pagedar MD MPH 《Head & neck》2016,38(Z1):E1188-E1191
85.
86.
87.
88.
Community-dwelling stroke survivors: function is not the whole story with quality of life 总被引:1,自引:0,他引:1
White JH Alston MK Marquez JL Sweetapple AL Pollack MR Attia J Levi CR Sturm J Whyte S 《Archives of physical medicine and rehabilitation》2007,88(9):1140-1146
OBJECTIVE: To compare function and quality of life in community-dwelling stroke survivors at 1, 3, and 5 years after stroke. DESIGN: A community-based, cross-sectional study of 3 retrospective cohorts. SETTING: Community-dwelling stroke survivors in Australia. PARTICIPANTS: The 3 cohorts comprised 30 participants each at 1, 3, and 5 years poststroke discharge from a tertiary referral hospital. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Stroke severity, comorbidity, medications used, and demographic information were recorded. Poststroke function was assessed using the Modified Rankin Scale, Mini-Mental State Examination, Stroke Impact Scale, and Multidimensional Scale of Perceived Social Support. RESULTS: This cross-sectional study provides insights into trends in stroke survivors over time. A high proportion of stroke survivors use community services, even those who are independent with activities of daily living. Although there was little attrition in medication use over time except for warfarin, this was from a baseline of suboptimal compliance and adherence with stroke preventive therapies. Stroke survivors report high levels of perceived social support; however, emotional well-being was low overall. The data suggest that those who are independent at 1 year tend to remain independent, although this was an extrapolation from serial cross-sections and needs to be explored in a longitudinal study. CONCLUSIONS: Stroke survivors' function does not change significantly over time. A high proportion of survivors require community services. The development of needs-related effective long-term service delivery models is required. 相似文献
89.
90.
Sergey Mironov Charles D. Hwang Jean Nemzek John Li Kavitha Ranganathan Jonathan T. Butts David J. Cholok Vladislav A. Dolgachev Stewart C. Wang Mark Hemmila Paul S. Cederna Michael D. Morris Omer Berenfeld Benjamin Levi 《Wound repair and regeneration》2020,28(2):185-193
Existing clinical approaches and tools to measure burn tissue destruction are limited resulting in misdiagnosis of injury depth in over 40% of cases. Thus, our objective in this study was to characterize the ability of short‐wave infrared (SWIR) imaging to detect moisture levels as a surrogate for tissue viability with resolution to differentiate between burns of various depths. To accomplish our aim, we constructed an imaging system consisting of a broad‐band Tungsten light source; 1,200‐, 1,650‐, 1,940‐, and 2,250‐nm wavelength filters; and a specialized SWIR camera. We initially used agar slabs to provide a baseline spectrum for SWIR light imaging and demonstrated the differential absorbance at the multiple wavelengths, with 1,940 nm being the highest absorbed wavelength. These spectral bands were then demonstrated to detect levels of moisture in inorganic and in vivo mice models. The multiwavelength SWIR imaging approach was used to diagnose depth of burns using an in vivo porcine burn model. Healthy and injured skin regions were imaged 72 hours after short (20 seconds) and long (60 seconds) burn application, and biopsies were extracted from those regions for histologic analysis. Burn depth analysis based on collagen coagulation histology confirmed the formation of superficial and deep burns. SWIR multispectral reflectance imaging showed enhanced intensity levels in long burned regions, which correlated with histology and distinguished between superficial and deep burns. This SWIR imaging method represents a novel, real‐time method to objectively distinguishing superficial from deep burns. 相似文献