Karakitsos and coworkers, in this journal, reported further compelling evidence on the value of ultrasound in guiding internal jugular vein catheterization. In a large, prospective, randomized study of 900 patients, comparisons were made between patients in whom the procedure was performed using landmark-based techniques and those assigned to ultrasound guidance. The key benefits from use of ul...

in order to evaluate the economic performance of rehabilitation centers for addicted persons, the welfare organization asked all its centers to send the expense table of esfand 79-80 and fill out the information wanted there. the economic analysis is based upon this information. also, each center is provided with a questionnaire to estimate monthly expenses. according to the preventive scale of...

in recent years, preservation of fertility in women has been of great importance, especially in patients exposed to deleterious conditions on fertility. thus, cryopre-servation of human gametes, embryos and ovarian tissue has become an essential part of assisted reproduction. this approach limits the number of embryos transferred, while supernumerary oocytes and/ or embryos can be used in subse...

high inflation has been as one of the characteristics of developing countries including iran and its economic and social impacts are extensive. compiling policies for economic development requires that inflation impacts on different social classes should be studied carefully. microeconomic analyses show that because of higher increase in price of goods that have higher share in consumption bund...