background: vitamin d deficiency is a pandemic problem mostly diagnosed in elderly. few studies are available exclusively done on the topic among young adults. specific professions such as medical students may have higher risk for developing hypovitaminosis d. we aimed to assess the vitamin d status in medical students of iran university of medical sciences; and to define a cut‑off point for 25...

the aim of this empirical study is to explore the trade-off model and pecking order model of capital structure. the investigation is performed using panel data procedures for a sample of 76 firms listed in tehran stock exchange during 2007-2010.the study employs ols regression model in examining the capital structure of firms in iran. the study employs variables reflecting differing theoretical...

objective: to investigate the clinical advantage of several prognostic factors for predicting preterm delivery. materials and methods: eighty and six patients with a singleton pregnancy admitted to vali-asr hospital underwent genetic amniocentesis between the 15th and 23th weeks were included in this study. maternal serum c-reactive protein (crp), transvaginal sonographic measurement of cervica...