objectives: irritable bowel syndrome (ibs) is a common gastrointestinal disorder. due to its high prevalence and absence of curative therapy, ibs has the potential to create tremendous burden on the health care system. herein, we systematically reviewed the published literature to investigate the epidemiology of ibs in iran. methods: studies that were reviewed in this article were primarily ide...

it is well known that ground-shaking site effect caused by an earthquake can vary significantly within a small distance. this is because at sites having soft soil and/or topographic and basement undulations, seismic energy gets trapped, leading to amplification of vibration that may cause considerable damage to man-made structures. theoretical analysis and observational data have shown that eac...