asthma is one of the most common problems of childhood, responsible for a significant proportion of abstinence from school because of chronic illness. this study was carried out among the school-aged children (7-18 years) in tehran schools during 2002-2003, in order to determine the frequency of asthma. according to the recommendation of who (world health organization), we designed a questionna...

background: environment of basrah is seriously contaminated with chemical leukomogens as a result of recent military conflicts. many studies in the past few years have reported an increase in the incidence of leukemia in basrah. this study was designed to study the risk and pattern of childhood leukemia in basrah, iraq, from 2003 to 2007.materials and methods: this hospital-based cancer registr...

background gastrointestinal stromal tumors (gist) are the most common mesenchymal tumors of the gastrointestinal (gi) tract. they are usually c-kit positive and seen slightly more common in men. these tumors are seen in the gi tract from the esophagus to the anus with occasional invasion or metastasis. method in this retrospective study, we evaluated the prevalence of c-kit positive stromal tum...

Different species of baleen whales display distinct spatial distribution patterns in the Scotia Sea during austral summer. Passive acoustic and visual surveys for were conducted aboard RRS James Clark Ross around South Georgia January February 2003. Identified calls from four recorded survey including southern right (Eubalaena australis), blue (Balaenoptera musculus), fin (B. physalus) humpback...

In the past few decades, it has become increasingly popular and important to utilize mathematical models to understand how microscopic intercellular interactions lead to the macroscopic pattern formation ubiquitous in the biological world. Modeling methodologies come in a large variety and presently it is unclear what is their interrelationship and the assumptions implicit in their use. They ca...