首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   567篇
  免费   43篇
耳鼻咽喉   2篇
儿科学   9篇
妇产科学   9篇
基础医学   53篇
口腔科学   42篇
临床医学   44篇
内科学   108篇
皮肤病学   13篇
神经病学   13篇
特种医学   15篇
外科学   139篇
综合类   23篇
预防医学   40篇
眼科学   7篇
药学   20篇
肿瘤学   73篇
  2021年   6篇
  2020年   5篇
  2019年   14篇
  2018年   15篇
  2017年   9篇
  2016年   5篇
  2015年   20篇
  2014年   24篇
  2013年   29篇
  2012年   30篇
  2011年   28篇
  2010年   22篇
  2009年   11篇
  2008年   25篇
  2007年   22篇
  2006年   21篇
  2005年   9篇
  2004年   16篇
  2003年   11篇
  2002年   12篇
  2001年   5篇
  1999年   11篇
  1998年   4篇
  1997年   11篇
  1996年   4篇
  1995年   8篇
  1993年   4篇
  1992年   10篇
  1990年   9篇
  1989年   8篇
  1987年   6篇
  1986年   8篇
  1985年   4篇
  1984年   6篇
  1981年   3篇
  1979年   8篇
  1978年   6篇
  1977年   12篇
  1976年   16篇
  1975年   12篇
  1974年   11篇
  1973年   11篇
  1972年   13篇
  1971年   12篇
  1970年   14篇
  1969年   5篇
  1967年   4篇
  1966年   3篇
  1965年   3篇
  1964年   4篇
排序方式: 共有610条查询结果,搜索用时 31 毫秒
1.
2.
We followed 18,490 infants from their first visit to a county child health clinic (CHC) in Maryland through visits through their third year of age to investigate whether their continued use of the CHCs was related to their characteristics or to the services they were provided as an infant. We classified as provided services immunization, an Early and Periodic Screening, Diagnosis, and Treatment Program (EPSDT) recommended screening, and number of visits. Immunization was associated with an increased percentage of infants who returned to the CHCs at two and three years of age. Half of the children, on the other hand, never returned to the clinics if they were not immunized as infants. These findings persisted, regardless of race, Medicaid status, completion of a screening, or number of visits in the first year of life. One-fifth of infants did not receive an immunization during one or more visits to CHCs in their first year. Failure to administer an immunization to infants appears to impede subsequent use of public health clinics for well child care.  相似文献   
3.
Oscillatory motion of the normal cervical spinal cord   总被引:2,自引:0,他引:2  
  相似文献   
4.
5.
It has previously been shown that, in the heterozygous state, mutations in the SOX9 gene cause campomelic dysplasia (CD) and the often associated autosomal XY sex reversal. In 12 CD patients, 10 novel mutations and one recurrent mutation were characterized in one SOX9 allele each, and in one case, no mutation was found. Four missense mutations are all located within the high mobility group (HMG) domain. They either reduce or abolish the DNA-binding ability of the mutant SOX9 proteins. Among the five nonsense and three frameshift mutations identified, two leave the C-terminal transactivation (TA) domain encompassing residues 402-509 of SOX9 partly or almost completely intact. When tested in cell transfection experiments, the recurrent nonsense mutation Y440X, found in two patients who survived for four and more than 9 years, respectively, exhibits some residual transactivation ability. In contrast, a frameshift mutation extending the protein by 70 residues at codon 507, found in a patient who died shortly after birth, showed no transactivation. This is apparently due to instability of the mutant SOX9 protein as demonstrated by Western blotting. Amino acid substitutions and nonsense mutations are found in patients with and without XY sex reversal, indicating that sex reversal in CD is subject to variable penetrance. Finally, none of 18 female patients with XY gonadal dysgenesis (Swyer syndrome) showed an altered SOX9 banding pattern in SSCP assays, providing evidence that SOX9 mutations do not usually result in XY sex reversal without skeletal malformations.   相似文献   
6.
7.
8.
BackgroundMany antibiotics require dosage adjustments in patients with renal impairment. In Phase III studies, omadacycline was non-inferior to moxifloxacin and linezolid in adults with community-acquired bacterial pneumonia (CABP) and acute bacterial skin and skin structure infections (ABSSSI), respectively. This analysis evaluated efficacy and safety measures from three omadacycline studies by patient renal function.MethodsPatients were stratified as having normal renal function (creatinine clearance >89 mL/min), mild renal impairment (creatinine clearance 60–89 mL/min) or moderate renal impairment (creatinine clearance <60 mL/min); creatine clearance ≤30 mL/min (severe renal impairment) was an exclusion criterion. Efficacy endpoints were clinical success at the early clinical response (ECR) and post-treatment evaluation (PTE) time-points. Safety was evaluated as treatment-emergent adverse events (TEAEs) and laboratory measures.ResultsThis subgroup analysis included 773 patients with CABP and 1339 patients with ABSSSI in intent-to-treat (ITT) and modified ITT populations, respectively. Clinical success rates were high at ECR and PTE across the studies (CABP 75–90%; ABSSSI 74–95%), and broadly similar between treatments, irrespective of renal function. Rates of TEAEs in patients with ABSSSI ranged from 33% to 52%, and were similar across renal function groups. In patients with CABP, higher rates were observed in patients with moderate renal impairment (56–61%) compared with patients with normal renal function or mild renal impairment (35–49%). The most common TEAEs were nausea and vomiting.ConclusionsClinical success was similar across renal function groups, indicating no notable difference in the efficacy of omadacycline in patients with mild or moderate renal impairment. Omadacycline and comparators displayed similar safety profiles.ClinicalTrials.gov registryOPTIC (NCT02531438); OASIS-1 (NCT02378480); OASIS-2 (NCT02877927).  相似文献   
9.
10.
Summary An open prospective trial of combined ganciclovir and foscarnet therapy for 3 weeks was initiated in 14 episodes of severe CMV-disease in 13 HIV-infected patients (all CDC class IV, age 30–42, median 34 years, CD4+ cell count 0–80, median 10/µl). In seven episodes of gastrointestinal disease (five colitis, two esophagitis) remission of symptoms and mucosal changes was achieved in five. In seven episodes of retinitis, scarring was achieved in six. Renal toxicity was seen in two patients, moderate hematologic toxicity in eight patients. Overall efficacy was comparable to monotherapy; no new toxicities were seen with the combination of these two drugs.
Kombinationstherapie mit Ganciclovir und Foscarnet bei schwerer CMV-Erkrankung bei HIV-infizierten Patienten
Zusammenfassung In 14 Episoden einer CMV-Erkrankung bei 13 HIV-infizierten Patienten wurde eine Kombinationstherapie mit Ganciclovir und Foscarnet in einer offenen, prospektiven, nicht randomisierten Studie durchgeführt. Alle Patienten (n=13, Alter 30–42, Median 34 Jahre; CD4+Lymphozyten 0–80, Median 10/µl; alle Stadium IV CDC) wurden über 3 Wochen mit 2 × 5 mg/kg/d Ganciclovir und 2 × 90 mg/kg/d Foscarnet behandelt. In sieben Episoden einer gastrointestinalen CMV-Erkrankung (Colitis fünf, Ösophagitis zwei) wurde eine Remission in fünf Episoden erzielt, bei CMV-Retinitis in sechs von sieben Fällen. Nephrotoxizität trat bei zwei Patienten auf, mäßige Hämatotoxizität bei acht Patienten, sämtlich reversibel. Die Wirksamkeit der Therapie ist ähnlich der Monotherapie, die Nebenwirkungen sind additiv.
  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号