全文获取类型
收费全文 | 3276632篇 |
免费 | 271259篇 |
国内免费 | 13937篇 |
专业分类
耳鼻咽喉 | 44557篇 |
儿科学 | 104780篇 |
妇产科学 | 83907篇 |
基础医学 | 526168篇 |
口腔科学 | 87949篇 |
临床医学 | 295479篇 |
内科学 | 572549篇 |
皮肤病学 | 88807篇 |
神经病学 | 281636篇 |
特种医学 | 128465篇 |
外国民族医学 | 331篇 |
外科学 | 506463篇 |
综合类 | 101270篇 |
现状与发展 | 24篇 |
一般理论 | 2304篇 |
预防医学 | 277450篇 |
眼科学 | 74965篇 |
药学 | 223137篇 |
23篇 | |
中国医学 | 9412篇 |
肿瘤学 | 152152篇 |
出版年
2021年 | 55182篇 |
2020年 | 35209篇 |
2019年 | 58185篇 |
2018年 | 71189篇 |
2017年 | 54296篇 |
2016年 | 59947篇 |
2015年 | 74036篇 |
2014年 | 108407篇 |
2013年 | 173893篇 |
2012年 | 89530篇 |
2011年 | 89500篇 |
2010年 | 116297篇 |
2009年 | 120877篇 |
2008年 | 76549篇 |
2007年 | 78993篇 |
2006年 | 89941篇 |
2005年 | 85282篇 |
2004年 | 87345篇 |
2003年 | 78103篇 |
2002年 | 67894篇 |
2001年 | 94742篇 |
2000年 | 87263篇 |
1999年 | 88933篇 |
1998年 | 64492篇 |
1997年 | 62481篇 |
1996年 | 60208篇 |
1995年 | 55750篇 |
1994年 | 50043篇 |
1993年 | 46581篇 |
1992年 | 62541篇 |
1991年 | 59659篇 |
1990年 | 56710篇 |
1989年 | 56098篇 |
1988年 | 51750篇 |
1987年 | 51152篇 |
1986年 | 48241篇 |
1985年 | 48787篇 |
1984年 | 45381篇 |
1983年 | 41643篇 |
1982年 | 40777篇 |
1981年 | 38573篇 |
1980年 | 36284篇 |
1979年 | 37147篇 |
1978年 | 33813篇 |
1977年 | 31020篇 |
1976年 | 28507篇 |
1975年 | 26898篇 |
1974年 | 27637篇 |
1973年 | 26600篇 |
1972年 | 24692篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
152.
F. Fruzzetti G. Palla A. Sbrana T. Simoncini M. R. Sessa 《Gynecological endocrinology》2020,36(10):938-940
AbstractObjective: To understand the origin of extremely high gonadotropin levels in a perimenopausal woman.Methods: A 52-year-old woman with a 2?months of amenorrhea followed spontaneous menstrual cycles recovery was referred to our outpatient clinic with elevated follicle-stimulating hormone (FSH, 483 mUI/ml), luteinizing hormone (LH, 475 mUI/ml) and prolactin (PRL, 173?ng/ml). She was known to take levosulpiride. The gonadotropin levels did not fit with the clinical features.Results: A gonadotroph tumor was ruled out. Further analysis confirmed constantly high FSH, LH and PRL levels. The measurements were repeated using different analytical platforms with different results. After serial dilutions, nonlinearity was present suggesting an immunoassay interference. After post-polyethylene glycol recovery, hormone levels appeared in the normal range. Anti-goat antibodies were recognized in the serum of the patient.Conclusions: This case report shows a case of falsely abnormal high gonadotropin and PRL levels in a woman during menopause transition. In the clinical practice the evaluation of gonadotropin profile is not recommended at this age, but the abnormal levels stimulated further evaluation. An interference in the assay due to anti-goat antibodies resulted in abnormally high level of FSH and LH. A strict collaboration between clinicians and the laboratory is needed, when laboratory findings do not correspond to clinical findings. 相似文献
153.
C. Dessinioti C.C. Zouboulis V. Bettoli D. Rigopoulos 《Journal of the European Academy of Dermatology and Venereology》2020,34(10):2229-2240
Guidelines and consensus on the management of patients with acne aim to give evidence-based, expert-group recommendations. This review compares current guidelines and consensus articles to provide a compilation of recommendations on the treatment of acne with oral isotretinoin. Ten common, relevant, clinical questions are addressed, based on published recommendations, including the indications of isotretinoin, the proposed daily dose, the cumulative isotretinoin dose and the laboratory monitoring needed. Recommendations on special considerations are also addressed, including the timing of procedures and the question of an association of depression or inflammatory bowel disease with isotretinoin. A major limitation is the use of different classification systems for acne across guidelines. The recommended daily dose ranges from 0.3 to 0.5 mg/kg in the European guidelines to up to 1 mg/kg in the US guidelines. A specific duration of treatment of at least 6 months is only recommended in the European guidelines. All guidelines report the need of strict pregnancy prevention measures. The European, French and US guidelines recommend to monitor for symptoms of depression. Important clinical questions that are inconsistently addressed in guidelines include the age indication, the recommendation for a cumulative dose, the timing of procedures, the association of isotretinoin with IBD, the recommendation for preventing acne flares and for appropriate laboratory monitoring. These topics should be clearly included in the recommendations of guidelines as they are often raised in everyday clinical practice. 相似文献
154.
155.
156.
157.
158.
The Transient Receptor Potential Vanilloid 1 Antagonist Capsazepine Improves the Impaired Lung Mechanics during Endotoxemia 下载免费PDF全文
Layla D. M. Cabral Alexandre Giusti‐Paiva 《Basic & clinical pharmacology & toxicology》2016,119(5):421-427
Acute lung injury (ALI) caused by systemic inflammatory response remains a leading cause of morbidity and mortality in critically ill patients. Management of patients with sepsis is largely limited to supportive therapies, reflecting an incomplete understanding of the underlying pathophysiology. Furthermore, there have been limited advances in the treatments for ALI. In this study, lung function and a histological analysis were performed to evaluate the impact of transient receptor potential vanilloid‐1 receptor (TRPV1) antagonist (capsazepine; CPZ) on the lipopolysaccharide (LPS)‐induced lung injury in mice. For this, adult mice pre‐treated with CPZ or vehicle received intraperitoneal injections of LPS or saline and 24 hr after, the mice were anaesthetized, and lung mechanics was evaluated. The LPS‐challenged mice exhibited substantial mechanical impairment, characterized by increases in respiratory system resistance, respiratory system elastance, tissue damping and tissue elastance. The pre‐treatment with CPZ prevented the increase in respiratory system resistance and decreased the increase in tissue damping during endotoxemia. In addition, mice pre‐treated with CPZ had an attenuated lung injury evidenced by reduction on collapsed area of the lung parenchyma induced by LPS. This suggests that the TRPV1 antagonist capsazepine has a protective effect on lung mechanics in ALI during endotoxemia and that it may be a target for enhanced therapeutic efficacy in ALI. 相似文献
159.
160.
Assessment of Myocardial Infarct Size by Three‐Dimensional and Two‐Dimensional Speckle Tracking Echocardiography: A Comparative Study to Single Photon Emission Computed Tomography 下载免费PDF全文