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background the impact factor (if), as the most important criterion for journal’s quality measurement, is affected by the self-citation and number of publications in each journal. objectives to find out the relationship between the number of publications and self-citations in a journal, and their correlations with if. materials and methods self-citations and impact factors of nine top gastroente...

background: the purpose of this study was to detect the prevalence of ghost and honorary authors and its determinant factors in bio-medical journals of iran. methods: the study was done in 2009-10 in tehran, kerman, and iran medical universities, iran.  we contacted the first or corresponding authors of the papers had published papers in the recent two issues of iranian journal of public health...

three nearly simultaneous events around the end of the 19th century, i.e., the discovery of x‐rays by roentgen in 1895, natural radioactivity by antoine‐henri becquerel in 1896 and isolation of radium by the curies' in 1898 opened the nuclear era which has changed broadly the worlds of physics, biology and medicine. at the close of the 20th century, fundamental discoveries in biology at mo...

ethical consideration is a basic requirement for design of randomized clinical trials. the purpose of this study was to assess whether reports of iranian dental clinical trials complied with the requirements of the ethical principles of human research.in this retrospective observational study electronic search was performed to identify all dental clinical trials published between 2001 and 2011....