全文获取类型
收费全文 | 1239篇 |
免费 | 187篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 53篇 |
妇产科学 | 20篇 |
基础医学 | 83篇 |
口腔科学 | 38篇 |
临床医学 | 206篇 |
内科学 | 269篇 |
皮肤病学 | 104篇 |
神经病学 | 39篇 |
特种医学 | 132篇 |
外科学 | 186篇 |
综合类 | 94篇 |
现状与发展 | 30篇 |
预防医学 | 51篇 |
眼科学 | 15篇 |
药学 | 31篇 |
中国医学 | 3篇 |
肿瘤学 | 70篇 |
出版年
2024年 | 18篇 |
2023年 | 179篇 |
2022年 | 12篇 |
2021年 | 16篇 |
2020年 | 55篇 |
2019年 | 21篇 |
2018年 | 51篇 |
2017年 | 45篇 |
2016年 | 39篇 |
2015年 | 56篇 |
2014年 | 82篇 |
2013年 | 60篇 |
2012年 | 27篇 |
2011年 | 29篇 |
2010年 | 73篇 |
2009年 | 87篇 |
2008年 | 28篇 |
2007年 | 50篇 |
2006年 | 18篇 |
2005年 | 17篇 |
2004年 | 10篇 |
2003年 | 14篇 |
2002年 | 15篇 |
2001年 | 10篇 |
2000年 | 13篇 |
1999年 | 25篇 |
1998年 | 35篇 |
1997年 | 49篇 |
1996年 | 40篇 |
1995年 | 35篇 |
1994年 | 29篇 |
1993年 | 34篇 |
1992年 | 7篇 |
1991年 | 7篇 |
1990年 | 9篇 |
1989年 | 22篇 |
1988年 | 20篇 |
1987年 | 14篇 |
1986年 | 4篇 |
1985年 | 11篇 |
1984年 | 4篇 |
1983年 | 3篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1978年 | 5篇 |
1977年 | 3篇 |
1976年 | 13篇 |
1975年 | 10篇 |
1974年 | 3篇 |
排序方式: 共有1444条查询结果,搜索用时 15 毫秒
961.
Yi Wang MD PhD Lei Yuan MD Rui-liang Ge MD Yanfu Sun MB Gongtian Wei MM 《Annals of surgical oncology》2013,20(3):914-922
Background
The significance of surgery in the treatment of hepatocellular carcinoma (HCC) extending into the inferior vena cava (IVC)/right atrium (RA) is currently unclear. We sought to clarify whether surgical treatment can improve survival in such patients.Methods
A retrospective review was undertaken of patients with HCC and IVC/RA tumor thrombus who were potential candidates for surgery but who were finally treated surgically and nonsurgically between September 2000 and October 2010. The patients were subdivided according to therapeutic modalities, and the results for each group were compared.Results
A total of 56 patients were included in this study. They were divided into three groups. Twenty-five patients underwent hepatectomy plus thrombectomy (surgical group), with minor morbidity and no mortality; the patients in this group had 1-, 3-, and 5-year survival rates of 68.0, 22.5, and 13.5 %, respectively, with a median survival of 19 months. Twenty patients were treated with transcatheter arterial chemoembolization, with 1- and 3-year survival rates of 15.0 and 5.0 %, respectively (median survival 4.5 months). Eleven patients received symptomatic treatment only, and no one in this group survived longer than 1 year (median survival 5 months). The patients in surgical group survived significantly longer than the patients in the other two groups (p < 0.001).Conclusions
Although technically challenging, surgery for HCC with IVC/RA tumor thrombus can be safely performed and should be considered in patients with resectable primary tumor and sufficient hepatic reservoir because compared with transcatheter arterial chemoembolization or symptomatic treatment, it significantly improved patient survival. 相似文献962.
Huaxia Chen MM Zhou Wang MD Zhe Yang MM Bin Shang MB Xiangyan Liu MD Gang Chen MD 《Annals of surgical oncology》2013,20(8):2721-2726
Purpose
To investigate whether Ivor-Lewis esophagectomy combined with adjuvant radiotherapy prevents lymphatic metastatic recurrence in esophageal cancer patients.Methods
A total of 113 stage IIA esophageal squamous cell carcinoma patients after Ivor-Lewis esophagectomy were accepted mRNA expression of Mucoid 1 (MUC1) gene detection. Positive patients were enrolled onto the adjuvant radiotherapy group (with postoperative adjuvant radiotherapy). Negative patients were enrolled onto the control group (without postoperative adjuvant radiotherapy or chemotherapy). The radiotherapy area consisted of the neck, supraclavicular region, and superior mediastinum (including paraesophageal and paratracheal region). Survival difference was compared by the χ2 test, and the Kaplan–Meier method was performed to calculate the survival rate and recurrence rate. Logistic regression analysis was performed to determined independent risk factors.Results
The radiotherapy area lymphatic metastatic recurrence rate in adjuvant radiotherapy group (16.7 %, 5 of 30) was lower than patients without postoperative adjuvant radiotherapy (45.8 %, 38 of 83) (P < 0.05). Only compared to positive patients without postoperative adjuvant radiotherapy (60.0 %, 6 of 10) was the rate (16.7 %, 5 of 30) significantly lower (P < 0.01). Cancer recurrence was recognized in 48.6 % (55 of 113) patients within 3 years after surgery, including 38.1 % (43 of 113) patients with radiotherapy area recurrence. Logistic analysis revealed that T status (P < 0.01) and adjuvant radiotherapy (P < 0.05) were independent risk factors of lymph node metastasis in the first 3 years after surgery.Conclusions
In MUC1 mRNA-positive esophageal squamous cell carcinoma patients, adjuvant radiotherapy could significantly reduce the lymph node metastasis rate in the radiotherapy area after Ivor-Lewis esophagectomy. Compared with traditional therapeutic methods, Ivor-Lewis esophagectomy combined with adjuvant radiotherapy can achieve similar curative effects in MUC1 mRNA-positive patients. 相似文献963.
964.
H López‐Escribano MM Parera P Guix JM Serra A Gutierrez D Balsells E Oliva‐Berini JA Castro MM Ramon A Picornell 《Clinical genetics》2013,83(2):175-180
López‐Escribano H, Parera MM, Guix P, Serra JM, Gutierrez A, Balsells D, Oliva‐Berini E, Castro JA, Ramon MM, Picornell A. Balearic archipelago: three islands, three beta‐thalassemia population patterns. The mutation spectrum of 175 β‐thalassemia (β‐thal) carriers, identified in pilot carrier screening on 22,713 individuals from Balearic Islands (Spain), is reported. The β0 CD39 (C>T) mutation is the most frequent (61.1%), followed by β+ IVS‐I‐110 (G>A) (12.0%), β+ IVS‐I‐6 (T>C) and β0 IVS‐1‐1 (G>A) (3.4% both) and eight other rare mutations (2.9–0.6%); with a distinct prevalence and distribution between islands. Minorca shows the highest prevalence in Iberian populations, with a single mutation, CD39 (C>T), present in most β‐thal carriers. Ibiza is the only Western Mediterranean population where the most frequent β‐thal mutation is IVS‐I‐110 (G>A). These results can be explained by a combination of historical–demographic characteristics together with evolutionary forces such as founder effect, genetic drift and probably selection by malaria. Knowledge of the mutational spectrum in the Balearic Islands will enable to optimize mutation detection strategy for genetic diagnosis of β‐thal in these islands. 相似文献
965.
966.
967.
968.
Petra EA Huijts Antoinette Hollestelle Brunilda Balliu Jeanine J Houwing-Duistermaat Caro M Meijers Jannet C Blom Bahar Ozturk Elly MM Krol-Warmerdam Juul Wijnen Els MJJ Berns John WM Martens Caroline Seynaeve Lambertus A Kiemeney Henricus F van der Heijden Rob AEM Tollenaar Peter Devilee Christi J van Asperen 《European journal of human genetics : EJHG》2014,22(1):46-51
The 1100delC mutation in the CHEK2 gene has a carrier frequency of up to 1.5% in individuals from North-West Europe. Women heterozygous for 1100delC have an increased breast cancer risk (odds ratio 2.7). To explore the prevalence and clinical consequences of 1100delC homozygosity in the Netherlands, we genotyped a sporadic breast cancer hospital-based cohort, a group of non-BRCA1/2 breast cancer families, and breast tumors from a tumor tissue bank. Three 1100delC homozygous patients were found in the cohort of 1434 sporadic breast cancer patients, suggesting an increased breast cancer risk for 1100delC homozygotes (odds ratio 3.4, 95% confidence interval 0.4–32.6, P=0.3). Another 1100delC homozygote was found in 592 individuals from 108 non-BRCA1/2 breast cancer families, and two more were found after testing 1706 breast tumors and confirming homozygosity on their wild-type DNA. Follow-up data was available for five homozygous patients, and remarkably, three of them had developed contralateral breast cancer. A possible relationship between 1100delC and lung cancer risk was investigated in 457 unrelated lung cancer patients but could not be confirmed. Due to the small number of 1100delC homozygotes identified, the breast cancer risk estimate associated with this genotype had limited accuracy but is probably higher than the risk in heterozygous females. Screening for CHEK2 1100delC could be beneficial in countries with a relatively high allele frequency. 相似文献
969.
970.