全文获取类型
收费全文 | 2116篇 |
免费 | 157篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 104篇 |
妇产科学 | 44篇 |
基础医学 | 229篇 |
口腔科学 | 46篇 |
临床医学 | 166篇 |
内科学 | 395篇 |
皮肤病学 | 56篇 |
神经病学 | 103篇 |
特种医学 | 100篇 |
外科学 | 407篇 |
综合类 | 312篇 |
一般理论 | 3篇 |
预防医学 | 111篇 |
眼科学 | 20篇 |
药学 | 91篇 |
1篇 | |
肿瘤学 | 91篇 |
出版年
2023年 | 15篇 |
2022年 | 24篇 |
2021年 | 45篇 |
2020年 | 23篇 |
2019年 | 40篇 |
2018年 | 41篇 |
2017年 | 32篇 |
2016年 | 38篇 |
2015年 | 58篇 |
2014年 | 55篇 |
2013年 | 69篇 |
2012年 | 100篇 |
2011年 | 114篇 |
2010年 | 112篇 |
2009年 | 104篇 |
2008年 | 130篇 |
2007年 | 124篇 |
2006年 | 99篇 |
2005年 | 91篇 |
2004年 | 92篇 |
2003年 | 60篇 |
2002年 | 69篇 |
2001年 | 55篇 |
2000年 | 34篇 |
1999年 | 41篇 |
1998年 | 43篇 |
1997年 | 39篇 |
1996年 | 42篇 |
1995年 | 33篇 |
1994年 | 32篇 |
1993年 | 17篇 |
1992年 | 29篇 |
1991年 | 27篇 |
1990年 | 28篇 |
1989年 | 24篇 |
1988年 | 24篇 |
1987年 | 19篇 |
1986年 | 26篇 |
1985年 | 31篇 |
1984年 | 16篇 |
1983年 | 12篇 |
1982年 | 13篇 |
1981年 | 14篇 |
1979年 | 19篇 |
1978年 | 18篇 |
1977年 | 14篇 |
1976年 | 14篇 |
1973年 | 8篇 |
1972年 | 9篇 |
1966年 | 9篇 |
排序方式: 共有2286条查询结果,搜索用时 46 毫秒
1.
S. Nishida J. J. Gaynor N. Nakamura F. Butt H. G. Illanes J. Kadono G. W. Neff D. M. Levi J. I. Moon G. Selvaggi T. Kato P. Ruiz A. G. Tzakis J. R. Madariaga 《American journal of transplantation》2006,6(1):140-149
A retrospective study of 1058 liver transplant recipients was performed to determine: (i) the incidence, etiology, timing, clinical features and treatment of refractory ascites (RA), (ii) risk factors for RA development, (iii) predictors of RA disappearance, (iv) predictors of survival following RA and (v) the impact of RA on patient survival. Sixty-two patients (5.9%) developed RA and its disappearance occurred in 27/62 cases. Patients having hepatitis C virus (HCV) had a significantly higher hazard rate of developing RA (p < 0.00001). No other baseline characteristic was associated with RA. Cox stepwise regression analysis of the hazard rate of RA disappearance found two significant factors: HCV recurrence as the reason for developing RA implied a poorer outcome (p = 0.006), whereas an unknown reason implied a favorable outcome (p = 0.02). In addition, survival following RA was significantly poorer among patients having bacterial peritonitis or HCV recurrence. Finally, the mortality rate was significantly (nearly 8.6 times) higher in patients following RA development while it was ongoing (p < 0.00001); however, if the RA disappeared, then the additional risk of death also disappeared. This study illustrates the importance of developing an optimal treatment strategy to (i) effectively treat RA if it develops and (ii) prevent hepatitis C recurrence. 相似文献
2.
MUAMMER SEYHAN BAAK KANDI COKUN HÜLYA SALAM HAMDI ÖZCAN YELDA KARINCAOLU 《Pediatrics international》2006,48(6):525-530
BACKGROUND: The present study was aimed to define the gender ratio, familial occurrence, age of onset, precipitating factors, clinical types, nail and joint involvement of psoriasis in childhood and adolescence in Turkey. METHODS: A total of 61 children with psoriasis under 18 years old were evaluated retrospectively, for age, gender, age of disease onset, family history, concomitant disease, the clinical type of psoriasis, clinical localization, nail and joint involvement and treatment modalities. RESULTS: Of the patients, 23 (37.70%) were boys and 38 (62.30%) were girls. Mean age was 9.28 +/- 4.02 years in girls and 11.18 +/- 3.85 years in boys (9.96 +/- 4.03 years in all children). Mean age at the onset of the disease was 6.81 +/- 4.11 years in girls and 7.03 +/- 4.28 years in boys (6.89 +/- 4.14 years in all patients). In 14 (23%) cases, a positive family history was detected. The most frequent probable triggering factors were upper respiratory tract infections (14.8%) and positive throat culture for A group ss-hemolytic streptococcus (21.3%). Frequency of emotional stress and psychiatric morbidity were 54% and 9.8%, respectively. The most frequent localizations at onset were trunk (44.3%), extremities (54.0%), and scalp (36.0%). Three children (4.9%) had a history of dissemination from psoriatic diaper rash. In total, 51 (83.6%) patients presented with psoriasis vulgaris, eight (13.1%) with generalized pustular psoriasis, and the remaining two (3.3%) with erythrodermic psoriasis. CONCLUSION: The incidence of psoriasis among dermatological patients in childhood and adolescence was 3.8%. The disease tends to appear earlier in girls than boys. The authors suggested that stress and upper respiratory infections are the most important triggering factors in childhood and adolescence psoriasis. 相似文献
3.
V Aerra M Kuduvalli AN Moloto AK Srinivasan AD Grayson BM Fabri AY Oo 《Journal of cardiothoracic surgery》2006,1(1):6-5
Background
Atrial fibrillation can occur in up to 40% of patients undergoing coronary surgery. 相似文献4.
5.
6.
7.
8.
9.
A simple, precise method has been developed for assessing neutrophil secretory responses (release of vitamin B12 binding protein from specific granules) to challenge of aliquots of whole blood with the bacterial chemotactic peptide N-formylmethionyl-leucyl-phenylalanine (fMLP). Dose-response studies performed on blood from normal healthy volunteers showed higher maximal secretory responses in males than females (33.3 +/- SEM 2.2 vs. 27.4 +/- 2.5, P less than .005) a left shift in dose-response curves after feeding compared to fasting (P less than .005), spontaneous up-regulation of responses in blood incubated at 37 degrees C for 1 h, and marked upregulation in response to preincubation with endotoxin. This whole blood challenge method may be used to study neutrophil responses in groups of individuals or patients without the confounding effects of changes in cell responses resulting from cell isolation procedures. The method may also be used as a bioassay for neutrophil-activating factors. 相似文献
10.