全文获取类型
收费全文 | 194篇 |
免费 | 14篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 4篇 |
妇产科学 | 6篇 |
基础医学 | 24篇 |
口腔科学 | 1篇 |
临床医学 | 17篇 |
内科学 | 24篇 |
皮肤病学 | 1篇 |
神经病学 | 16篇 |
特种医学 | 1篇 |
外科学 | 20篇 |
预防医学 | 56篇 |
眼科学 | 3篇 |
药学 | 14篇 |
中国医学 | 2篇 |
肿瘤学 | 12篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2018年 | 7篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2014年 | 10篇 |
2013年 | 15篇 |
2012年 | 11篇 |
2011年 | 20篇 |
2010年 | 11篇 |
2009年 | 10篇 |
2008年 | 10篇 |
2007年 | 11篇 |
2006年 | 18篇 |
2005年 | 10篇 |
2004年 | 14篇 |
2003年 | 11篇 |
2002年 | 10篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1967年 | 1篇 |
1963年 | 1篇 |
1955年 | 1篇 |
1938年 | 1篇 |
排序方式: 共有209条查询结果,搜索用时 46 毫秒
21.
Christina Psaros Cecilia Milford Jennifer A. Smit Letitia Greener Nzwakie Mosery Lynn T. Matthews Abigail Harrison Janna R. Gordon Matthew Mimiaga Steven A. Safren 《Archives of sexual behavior》2018,47(7):1969-1982
Despite concerted prevention efforts, young South African women remain at the epicenter of the HIV epidemic. Although these women have grown up in a community powerfully affected by HIV, systematic investigation into how this “second generation” of HIV-affected youth navigates HIV risk is lacking. This study qualitatively explored a complex interplay of factors influencing HIV risk among young pregnant women in KwaZulu-Natal, South Africa. We conducted in-depth interviews with 35 pregnant women (22 HIV-uninfected and 13 HIV-infected) aged 18–21, 18 healthcare providers, and focus groups with 19 community stakeholders. Among the young women, HIV knowledge was high, and many reported taking some action to prevent pregnancy or HIV; however, these efforts were not routinely implemented. Themes related to HIV acquisition risk from all participants were organized using a socioecological framework and revolved around individual and developmental experiences (personal experience with HIV, perceived invincibility), family barriers (lack of adult supervision, pressure to leave school), relational barriers (lack of disclosure and partner communication, “burn out” around attempts to discuss condom use with partners, overdependence on partners), community-level barriers (township environment, lack of structured activities), and social barriers (poverty, HIV-related stigma). Some novel concepts emerged from the data, including an understanding of how overdependence on the romantic relationship may develop. Current HIV prevention efforts, including traditional HIV counseling and testing, condom distribution, and biomedical agents for HIV prevention, are unlikely to be effective without a broader, ecological up-to-date understanding of the evolving, intertwined, and complex constellation of factors that drive HIV risk behavior in this high-risk population. 相似文献
22.
Black women living with HIV/AIDS (LWHA) are a subgroup with the highest growing rates of HIV infection in the United States. Stigma and co-occurring mental and physical health problems have been reported among Black women LWHA, and research on the benefits of social and religious support, often major protective factors among Black women, has been met with mixed findings. The current study examined the relation between anticipated HIV stigma and mental and physical health symptoms and risk and protective factors (discrimination, coping, social support) among Black women LWHA (N = 220). Results showed that greater anticipated stigma was significantly related to poorer mental health status, greater discrimination, and greater use of negative coping strategies. Stigma was not related to physical health, perceived social support or use of positive coping strategies. This study lends support to the need for psychosocial interventions that reduce anticipated stigma among individuals LWHA, particularly Black women LWHA. 相似文献
23.
Lim L Bobyn JD Bobyn KM Lefebvre LP Tanzer M 《Clinical orthopaedics and related research》2012,470(2):357-365
Background
Noncemented revision arthroplasty is often complicated by the presence of bone implant gaps that reduce initial stability and biologic fixation. Demineralized bone matrix has osteoinductive properties and therefore the potential to enhance gap healing and porous implant fixation. 相似文献24.
Cheema T Salas C Morrell N Lansing L Reda Taha MM Mercer D 《The Journal of hand surgery》2012,37(4):699-705
25.
Earl S. Ford David M. Mannino Anne G. Wheaton Wayne H. Giles Letitia Presley-Cantrell Janet B. Croft 《Chest》2013,143(5):1395-1406
26.
The causes of colorectal carcinoma are multifactorial. Numerous lines of epidemiologic evidence support the role of dietary factors, with strong associations revealed for folate and calcium, more equivocal evidence exists for dietary antioxidants. Lifestyle factors such as physical activity, alcohol in-take, and tobacco use are also positively correlated with the risk of colorectal carcinoma. Health services research examines epidemiologic issues,clinical evidence regarding prevention and treatment, patient preferences,and other factors with the goal of improving the quality of care. Observations based on epidemiologic studies and health services research will in the future provide the basis for reducing personal and social burdens caused by colorectal carcinoma. 相似文献
27.
28.
Campbell JD Lewis JS McElmeel ML Fulcher LC Jorgensen JH 《Journal of clinical microbiology》2012,50(3):1023-1026
Extended-spectrum-beta-lactamase (ESBL)-producing members of the Enterobacteriaceae are often resistant to multiple drug classes, making therapy of urinary infections with oral antibiotics difficult. Previously it was shown that amoxicillin-clavulanate can provide clavulanate inhibition of ESBLs and protect an oral cephalosporin present in combination when tested by broth microdilution. This study has shown that disk approximation testing could detect favorable cephalosporin-clavulanate interactions among a group of 101 previously characterized members of the Enterobacteriaceae with CTX-M, SHV, or TEM ESBLs. 相似文献
29.
Kurniali PC Henry L Kurl R Meharg JV 《The American journal of emergency medicine》2012,30(1):265-265.e5
Inhalant abuse is the intentional inhalation of chemical vapors or volatile substance to achieve a euphoric effect. Although no statistical data are reported yet, inhalant abuse is potentially life-threatening and has resulted in a wide range of toxic effects such as central nervous system depression, seizures, aspiration, cardiac arrhythmia, asphyxiation, hypoxia, metabolic acidosis, and sudden death among others. We are reporting a 25-year-old white man who was brought to the emergency department after inhaling aerosolized computer-cleaning spray composed of difluoroethane. He was found to have marked upper and lower lip facial swelling consistent with angioedema. The patient also had a prolonged QT interval, mild inspiratory stridor, but no urticaria. In this case, we believe the difluoroethane-related angioedema represents either idiopathic or bradykinin-induced angioedema. 相似文献
30.
Anne G Wheaton Geraldine S Perry Daniel P Chapman Lela R McKnight-Eily Letitia R Presley-Cantrell Janet B Croft 《BMC public health》2011,11(1):295