全文获取类型
收费全文 | 3916篇 |
免费 | 820篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 100篇 |
儿科学 | 175篇 |
妇产科学 | 65篇 |
基础医学 | 229篇 |
口腔科学 | 56篇 |
临床医学 | 1154篇 |
内科学 | 998篇 |
皮肤病学 | 151篇 |
神经病学 | 276篇 |
特种医学 | 131篇 |
外科学 | 703篇 |
综合类 | 32篇 |
预防医学 | 144篇 |
眼科学 | 104篇 |
药学 | 96篇 |
中国医学 | 14篇 |
肿瘤学 | 327篇 |
出版年
2024年 | 23篇 |
2023年 | 158篇 |
2022年 | 85篇 |
2021年 | 177篇 |
2020年 | 235篇 |
2019年 | 116篇 |
2018年 | 273篇 |
2017年 | 211篇 |
2016年 | 240篇 |
2015年 | 213篇 |
2014年 | 336篇 |
2013年 | 372篇 |
2012年 | 207篇 |
2011年 | 182篇 |
2010年 | 270篇 |
2009年 | 302篇 |
2008年 | 179篇 |
2007年 | 137篇 |
2006年 | 155篇 |
2005年 | 110篇 |
2004年 | 74篇 |
2003年 | 51篇 |
2002年 | 49篇 |
2001年 | 65篇 |
2000年 | 45篇 |
1999年 | 50篇 |
1998年 | 51篇 |
1997年 | 62篇 |
1996年 | 55篇 |
1995年 | 48篇 |
1994年 | 24篇 |
1993年 | 16篇 |
1992年 | 18篇 |
1991年 | 23篇 |
1990年 | 14篇 |
1989年 | 13篇 |
1988年 | 9篇 |
1986年 | 13篇 |
1985年 | 17篇 |
1984年 | 13篇 |
1983年 | 6篇 |
1982年 | 3篇 |
1978年 | 5篇 |
1976年 | 3篇 |
1975年 | 5篇 |
1974年 | 3篇 |
1958年 | 3篇 |
1955年 | 6篇 |
1954年 | 4篇 |
1949年 | 6篇 |
排序方式: 共有4755条查询结果,搜索用时 15 毫秒
1.
2.
Jamaal L. Benjamin MD PhD Rebecca Dennis DO Stacy White Jr MD David Munson MD Sudha A. Anupindi MD Maciej Piskunowicz MD Kassa Darge MD PhD Ami Gokli MD Misun Hwang MD 《Journal of ultrasound in medicine》2020,39(5):1031-1036
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates. 相似文献
3.
4.
5.
6.
Javed A. Shaik Nima Estharabadi Ronda S. Farah Maria K. Hordinsky 《Experimental dermatology》2020,29(10):1004-1011
Platelet α-granules release growth factors (GFs) that promote healing and tissue regeneration. Platelet-rich plasma (PRP) is shown to be beneficial in treating alopecia, and however, clinical response can be inconsistent. Due to several fold enrichment of platelets secreting large quantities of GFs following PRP injections, heterogeneity in amounts of GFs secreted by platelets may contribute to inconsistent clinical responses. Herein, we evaluated factors that could potentially contribute to heterogeneous secretion of GFs by platelets. We measured platelet secretion of transforming growth factor beta1 (TGFβ1), platelet-derived growth factor (PDGF-BB), epidermal growth factor (EGF), vascular endothelial growth factor (VEGF) and fibroblast growth factor (FGF2) in aliquots of de-identified PRP samples from female patients undergoing therapy in the hair disease clinic. Although secretion of GFs by platelets was comparable in PRP samples of patients with non-cicatricial and cicatricial alopecia, a Shapiro-Wilk test for normal distribution indicated significant variability across all patient samples. The amount of GF secreted by platelets was comparable when PRP prepared from two FDA-cleared devices with distinct techniques were compared. We provide evidence of platelets secreting heterogeneous amounts of GFs within each sample as high and low secretion of random factors could be simultaneously detected. These results suggest inherent heterogeneity in secretion of GFs by platelets in patient samples that are not influenced by the device used to prepare PRP. Since some GFs could have antagonistic effects on hair growth, a balance between amounts of growth promoting and inhibiting factors may be crucial in determining clinical response to PRP therapy. 相似文献
7.
8.
Darren R. Feldman MD Yasser Ged MBBS Chung-Han Lee PhD Andrea Knezevic MS Ana M. Molina MD Ying-Bei Chen PhD Joshua Chaim DO Devyn T. Coskey MS Samuel Murray MS Satish K. Tickoo MD Victor E. Reuter MD Sujata Patil PhD Han Xiao MD Jahan Aghalar MD Arlyn J. Apollo MD Maria I. Carlo MD Robert J. Motzer MD Martin H. Voss MD 《Cancer》2020,126(24):5247-5255
9.
Fibromyalgia is a syndrome of widespread pain, nonrestorative sleep, disturbed mood, and fatigue. Optimal treatment involves
a multidisciplinary approach with a team of health care providers using pharmacologic and nonpharmacologic treatment. Because
of the heterogeneity of the illness, management should be individualized for the patient. Pharmacologic treatment should address
issues of pain control, sleep disturbance, fatigue, and any underlying coexisting mood disorder. Nonpharmacologic treatment
should include patient education, a regular exercise and stretching program, and cognitive behavioral therapy. All of these
are essential to improving functional capacity and quality of life. This review provides general guidelines in initiating
a successful pharmacologic treatment program for patients with fibromyalgia. 相似文献
10.