全文获取类型
收费全文 | 479篇 |
免费 | 29篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 47篇 |
妇产科学 | 15篇 |
基础医学 | 50篇 |
口腔科学 | 3篇 |
临床医学 | 35篇 |
内科学 | 102篇 |
皮肤病学 | 17篇 |
神经病学 | 14篇 |
特种医学 | 32篇 |
外国民族医学 | 1篇 |
外科学 | 67篇 |
综合类 | 11篇 |
预防医学 | 76篇 |
眼科学 | 4篇 |
药学 | 12篇 |
肿瘤学 | 19篇 |
出版年
2023年 | 3篇 |
2021年 | 7篇 |
2020年 | 9篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 6篇 |
2016年 | 6篇 |
2015年 | 6篇 |
2014年 | 8篇 |
2013年 | 12篇 |
2012年 | 28篇 |
2011年 | 23篇 |
2010年 | 21篇 |
2009年 | 14篇 |
2008年 | 30篇 |
2007年 | 26篇 |
2006年 | 23篇 |
2005年 | 24篇 |
2004年 | 29篇 |
2003年 | 23篇 |
2002年 | 10篇 |
2001年 | 17篇 |
2000年 | 12篇 |
1999年 | 10篇 |
1998年 | 10篇 |
1997年 | 11篇 |
1996年 | 14篇 |
1995年 | 3篇 |
1994年 | 6篇 |
1993年 | 7篇 |
1992年 | 5篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 14篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 2篇 |
1985年 | 6篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 5篇 |
1972年 | 4篇 |
1971年 | 2篇 |
1970年 | 3篇 |
1969年 | 5篇 |
1966年 | 2篇 |
排序方式: 共有508条查询结果,搜索用时 31 毫秒
1.
Sarah Hallas Andrea Nelson Susan O'Meara Una Adderley Pauline Meskell Jane Nixon Aonghus O'Loughlin Sebastian Probst Wael Tawfick Thomas Wild Georgina Gethin 《Journal of tissue viability》2021,30(3):317-323
BackgroundA venous leg ulcer is a chronic leg wound caused by poor venous blood circulation in the lower limbs. It is a recurring condition causing pain, malodour, reduced mobility, and depression. Randomised controlled trials evaluating treatments for venous leg ulcers provide important evidence to inform clinical decision-making. However, for findings to be useful, outcomes need to be clinically meaningful, consistently reported across trials, and fully reported. Research has identified the large number of outcomes reported in venous leg ulcer trials, impacting both synthesis of results, and clinical decision-making. To address this, a core outcome set will be developed. A core outcome set is an agreed standardised set of outcomes which should be, as a minimum, measured and reported in all trials which evaluate treatment effectiveness for a given indication. A core outcome set has the potential to reduce research waste, improve the utility of RCTs, reduce reporting bias, facilitate treatment comparisons across different sources of evidence and expedite the production of systematic reviews, meta-analyses and evidence-based clinical guidelines.AimThe aim of this project is to develop a core outcome set for research evaluating the effectiveness of interventions for treating venous leg ulceration.MethodsThrough a scoping review of the literature on venous leg ulceration, we will firstly identify a list of candidate outcome domains (broad categories in relation to what is being measured) from randomised controlled trials and qualitative research, and outcomes (specific methods in relation to what is being measured). In two further stages, we will use the resulting lists of outcome domains and outcomes to design two online surveys. A range of stakeholders will be invited to participate in the surveys and they will be asked to indicate which outcome domains and outcomes are most important and should be considered as core in future research reports. 相似文献
2.
3.
N Kishchuk J O'Loughlin S Paradis P Masson G Sacks-Silver 《The Journal of school health》1990,60(9):448-451
Evaluation of program implementation can help illuminate negative results of school-based smoking prevention programs. In three conventional quasiexperimental evaluations, no statistically significant impacts of smoking prevention programs on children's knowledge, attitudes, intentions, or behavior were detected. Complementary evaluations of program implementation along several dimensions using naturalistic methods suggested reasons for null effects were different at each site. These data were used to form hypotheses and recommendations for future interventions. 相似文献
4.
5.
Genetic diversity and molecular identification of mosquito species in the Anopheles maculatus group using the ITS2 region of rDNA. 总被引:2,自引:0,他引:2
C Walton P Somboon S M O'Loughlin S Zhang R E Harbach Y-M Linton B Chen K Nolan S Duong M-Y Fong I Vythilingum Z D Mohammed Ho Dinh Trung R K Butlin 《Infection, genetics and evolution》2007,7(1):93-102
The species diversity and genetic structure of mosquitoes belonging to the Anopheles maculatus group in Southeast Asia were investigated using the internal transcribed spacer 2 (ITS2) of ribosomal DNA (rDNA). A molecular phylogeny indicates the presence of at least one hitherto unrecognised species. Mosquitoes of chromosomal form K from eastern Thailand have a unique ITS2 sequence that is 3.7% divergent from the next most closely related taxon (An. sawadwongporni) in the group. In the context of negligible intraspecific variation at ITS2, this suggests that chromosomal form K is most probably a distinct species. Although An. maculatus sensu stricto from northern Thailand and southern Thailand/peninsular Malaysia differ from each other in chromosomal banding pattern and vectorial capacity, no intraspecific variation was observed in the ITS2 sequences of this species over this entire geographic area despite an extensive survey. A PCR-based identification method was developed to distinguish five species of the group (An. maculatus, An. dravidicus, An. pseudowillmori, An. sawadwongporni and chromosomal form K) to assist field-based studies in northwestern Thailand. Sequences from 187 mosquitoes (mostly An. maculatus and An. sawadwongporni) revealed no intraspecific variation in specimens from Thailand, Cambodia, mainland China, Malaysia, Taiwan and Vietnam, suggesting that this identification method will be widely applicable in Southeast Asia. The lack of detectable genetic structure also suggests that populations of these species are either connected by gene flow and/or share a recent common history. 相似文献
6.
7.
8.
Donor insemination: child development and family functioning in lesbian mother families 总被引:1,自引:5,他引:1
Brewaeys A; Ponjaert I; Van Hall EV; Golombok S 《Human reproduction (Oxford, England)》1997,12(6):1349-1359
Findings are presented of a comparative study investigating the family
relationships and the emotional and gender development of children raised
in lesbian mother families. A total of 30 lesbian mother families with 4-8
year old children created as a result of donor insemination (DI) were
compared with 38 heterosexual families with a DI child and with 30
heterosexual families who had a naturally conceived child. A variety of
assessment measures, including a standardized interview and questionnaires
from the parents and psychological testing of the child were used to
collect the data. The quality of the couples' relationships and the quality
of the mother-child interaction did not differ between lesbian mother
families and either of the heterosexual family groups. The quality of the
interaction between the social mother and the child in lesbian families was
superior to that between the father and the child in both groups of
heterosexual families. Childrens' own perception of their parents was
similar in all family types; the social mother in lesbian families was
regarded by the child to be as much a 'parent' as the father in both types
of heterosexual families. With regard to their emotional/behavioural
development, boys and girls raised in lesbian mother families were well
adjusted and their gender role development did not differ from that of
children raised in heterosexual families. These results indicate that child
and family development in lesbian mother families is similar to that of
heterosexual families.
相似文献
9.
Donor insemination: Dutch parents' opinions about confidentiality and donor anonymity and the emotional adjustment of their children 总被引:1,自引:4,他引:1
Brewaeys A; Golombok S; Naaktgeboren N; de Bruyn JK; van Hall EV 《Human reproduction (Oxford, England)》1997,12(7):1591-1597
Results from a comparative study investigating 38 donor insemination (DI)
Dutch families with 4-8 year old children are presented. The aims of this
study were to investigate parents' opinions on the issues of
confidentiality and donor anonymity, to assess the emotional development of
the children, and to examine in DI families the association between secrecy
with regard to the use of a donor and the emotional adjustment of the
children. The DI families were compared to families with a child conceived
by in-vitro fertilization (IVF) and to families with a naturally conceived
child. Secrecy appeared to be associated with DI and not with IVF: 74% of
the DI parents intended not to inform the child about the way in which
she/he was conceived, whereas none of the IVF parents intended to keep the
secret. Only one set of DI parents and two sets of IVF parents had actually
told the child. As to donor anonymity, a spread of opinions appeared among
DI parents; 57% preferred an anonymous donor, 31% would have liked non-
identifying information about the donor, 9% preferred the donor's identity
to be registered and 3% remained unsure. Parents' major concern was to know
more about the medical/genetic background of the donor. Mothers and fathers
in the DI families differed in their opinions concerning the issues of
confidentiality and donor anonymity: fathers, more often than mothers, were
secretive with regard to the use of a donor and husbands, more often than
their wives, were in favour of donor anonymity. With regard to the
emotional development of the children, more emotional/behavioural problems
were revealed among DI children than among children who were naturally
conceived. No association was found between secrecy and the
emotional/behavioural adjustment of the children.
相似文献
10.
BACKGROUND: Recently there has been increased interest in broadening the role of community pharmacists to include more health education and disease prevention activities such as patient counseling for risk management and interventions to improve compliance. However, to date, there is little information on interest in prevention among community pharmacists or on their current prevention practices. METHOD: Data on current health education and disease prevention practices, as well as interest in expanding their role in prevention, were collected in a cross-sectional mail survey of a random representative sample of community pharmacists currently practicing in the province of Quebec. RESULTS: Among 597 eligible subjects, 455 (76.2%) completed the questionnaire. Few pharmacists practice prevention routinely. Independent correlates of engaging in prevention included working in a smaller pharmacy (odds ratio (OR) 3. 2 (95% confidence interval 2.0-5.3)), owning the pharmacy (OR 1.9 (1. 2-3.0)), moderate/high job satisfaction (OR 2.1 (1.4-4.3)), and history of prevention activities in the pharmacy (OR 2.2 (1.4-3.6)). Over 90% of respondents reported that integrating prevention into their practices was important. Independent correlates of high perceived importance included working as a salaried pharmacist (OR 2. 3 (1.4-3.8)), high job satisfaction (OR 4.1 (1.7-9.7)), and currently practicing prevention (OR 2.0 (1.2-3.2)). The most important perceived barriers to integrating prevention included lack of time and lack of skills/instrumentation for practicing prevention. CONCLUSIONS: There is considerable interest among community pharmacists in expanding their role to include more prevention, but there are many barriers to actualizing this role. Further work should focus on ways to overcome these barriers because pharmacists are particularly well-situated to make an important contribution to prevention. 相似文献