background: p e r io d ontal d i s e ase i s a c h ro ni c des t ructi v e d i s e a s e w h ich o ccurs in adults, young people, and children .   perio d ontal disease and periodontal pathoge n s ha v e been associ a ted with se v er a l syste m ic dise a ses and more recen t ly, se v e r a l stu d ies have sug g es te d the relat i o n ship bet w een p e rio d ontal d isease and cancer. stu d...

in our study of surface markers of iranian children affected by acute lymphocytic leukemia, the majority(80 %)had non-t, non-b, or null cell leukemia. the null- cell l e ukemia had a better p r ogno s l s as was conf irmed by o t h ers. twe l v e of our patie nts who had null cell l e ukem i a are a live and well 18 mont hs to 20 mont hs a f t e r initiat i on of the r a py. three of t he patie...

Railway optimization problems have been studied from a mathematical programming perspective for decades. This approach is particularly well suited to model the multitude of constraints that typically arises in the context of a railway system. In recent years, these problems have attracted some attention in the algorithms community, with a focus on individual problem aspects, in an attempt to un...

a case o f intrahepatic stone and its t r eat ment i s present e d . the t ype s o f i ntrahepatic s tones , t h e etiological f act o r , t he ways of di agno s is and t reatment a re b eing discussed. the disease is common in far eastern c ountri es a nd asian are a, with c lonorchi s s i nens is inf estation, but s peci ally in iran when the s tones i s a lone in intrahepatic ducts without e...