background: more than 80% of patients with hematologic  malignancies will develop fever during more than one chemotherapy cycle combined with neutropenia. we aim to evaluate empiric antibiotic strategies in febrile neutropenic (fn) cancer patients. methods: this is a concurrent study performed in the “shahid ghazi” teaching hospital, hematology-oncology center of tabriz, iran during the period ...

background: bone mineral density (bmd) changes during the course of rheumatoid arthritis (ra). the present study was designed to investigate the status of bmd in patients with ra treated with anti-rheumatic drugs. methods: bmd at the femoral neck (fn-bmd) and lumbar spine (ls-bmd) were measured by dual energy x-ray absorptiometry (dxa) method using norland densitometer. disease activity (da) wa...

Let Fn be the Farey sequence of order n. For S?Fn we let Q(S)={x/y:x,y?S,x?y and y?0}. We show that if Q(S)?Fn, then |S|?n+1. Moreover, prove in any following cases: (1) Q(S)=Fn; (2) Q(S)?Fn |S|=n+1, must have S={0,1,12,…,1n} or S={0,1,1n,…,n?1n} except for n=4, where an additional set {0,1,12,13,23} second case. Our results are based on Graham's GCD conjectures, which been proved by Balasubram...

Let Out(Fn) denote the outer automorphism group of the free group Fn with n > 3. We prove that for any finite index subgroup Γ < Out(Fn), the group Aut(Γ) is isomorphic to the normalizer of Γ in Out(Fn). We prove that Γ is co-Hopfian : every injective homomorphism Γ → Γ is surjective. Finally, we prove that the abstract commensurator Comm(Out(Fn)) is isomorphic to Out(Fn).