收费全文 | 7998篇 |
免费 | 622篇 |
国内免费 | 14篇 |
耳鼻咽喉 | 30篇 |
儿科学 | 229篇 |
妇产科学 | 291篇 |
基础医学 | 984篇 |
口腔科学 | 97篇 |
临床医学 | 1448篇 |
内科学 | 1187篇 |
皮肤病学 | 156篇 |
神经病学 | 862篇 |
特种医学 | 173篇 |
外科学 | 870篇 |
综合类 | 124篇 |
一般理论 | 39篇 |
预防医学 | 947篇 |
眼科学 | 172篇 |
药学 | 486篇 |
中国医学 | 4篇 |
肿瘤学 | 535篇 |
2023年 | 44篇 |
2022年 | 90篇 |
2021年 | 177篇 |
2020年 | 99篇 |
2019年 | 182篇 |
2018年 | 205篇 |
2017年 | 150篇 |
2016年 | 149篇 |
2015年 | 194篇 |
2014年 | 278篇 |
2013年 | 372篇 |
2012年 | 511篇 |
2011年 | 559篇 |
2010年 | 310篇 |
2009年 | 267篇 |
2008年 | 411篇 |
2007年 | 506篇 |
2006年 | 474篇 |
2005年 | 480篇 |
2004年 | 459篇 |
2003年 | 414篇 |
2002年 | 412篇 |
2001年 | 121篇 |
2000年 | 99篇 |
1999年 | 109篇 |
1998年 | 100篇 |
1997年 | 87篇 |
1996年 | 70篇 |
1995年 | 62篇 |
1994年 | 49篇 |
1993年 | 46篇 |
1992年 | 79篇 |
1991年 | 86篇 |
1990年 | 78篇 |
1989年 | 66篇 |
1988年 | 57篇 |
1987年 | 60篇 |
1986年 | 72篇 |
1985年 | 66篇 |
1984年 | 62篇 |
1983年 | 52篇 |
1982年 | 43篇 |
1981年 | 38篇 |
1980年 | 38篇 |
1979年 | 42篇 |
1978年 | 35篇 |
1977年 | 26篇 |
1976年 | 22篇 |
1975年 | 25篇 |
1974年 | 22篇 |
Interstitial lung disease (ILD) represents a significant cause of morbidity and mortality in systemic sclerosis (SSc). The purpose of this study was to examine recirculating lymphocytes from SSc patients for potential biomarkers of interstitial lung disease (ILD). Peripheral blood mononuclear cells (PBMCs) were isolated from patients with SSc and healthy controls enrolled in the Vanderbilt University Myositis and Scleroderma Treatment Initiative Center cohort between 9/2017–6/2019. Clinical phenotyping was performed by chart abstraction. Immunophenotyping was performed using both mass cytometry and fluorescence cytometry combined with t-distributed stochastic neighbor embedding analysis and traditional biaxial gating. This study included 34 patients with SSc-ILD, 14 patients without SSc-ILD, and 25 healthy controls. CD21lo/neg cells are significantly increased in SSc-ILD but not in SSc without ILD (15.4 ± 13.3% vs. 5.8 ± 0.9%, p = 0.002) or healthy controls (5.0 ± 0.5%, p < 0.0001). While CD21lo/neg B cells can be identified from a single biaxial gate, tSNE analysis reveals that the biaxial gate is comprised of multiple distinct subsets, all of which are increased in SSc-ILD. CD21lo/neg cells in both healthy controls and SSc-ILD are predominantly tBET positive and do not have intracellular CD21. Immunohistochemistry staining demonstrated that CD21lo/neg B cells diffusely infiltrate the lung parenchyma of an SSc-ILD patient. Additional work is needed to validate this biomarker in larger cohorts and longitudinal studies and to understand the role of these cells in SSc-ILD.
相似文献Design: Forty-two patients participating in the Task Shifting Strategy for Hypertension program (23 males, 19 females, and mean age 61. 7 years) completed in-depth, qualitative interviews. Interviews were transcribed, and key words and phrases were extracted and coded using the PEN-3 Cultural Model as a guide through open and axial coding techniques, thus allowing rich exploration of the data.
Results: Emergent themes included patients’ perceptions of hypertension, which encompassed misperceptions of hypertension and blood pressure control. Additional themes included enablers and barriers to hypertension management, and how the intervention nurtured lifestyle change associated with blood pressure control. Primary enabling factors included the supportive nature of TASSH nurses, while notable barriers were financial constraints and difficulty accessing medication. Nurturing factors included the motivational interviewing and patient counseling which instilled confidence in the patients that they could make lasting behavior changes.
Conclusions: This study offers a unique perspective of blood pressure control by examining how patients view an on-going task-shifting initiative for hypertension management. The results of this study shed light on factors that can help and hinder individuals in low-resource settings with long-term blood pressure management. 相似文献