Background The Raymond–Roy Occlusion Classification (RROC) is the standard for
evaluating coiled aneurysms (Class I: complete obliteration; Class II: residual neck; Class III …

A mutation is described that alters the promoter specificity of σ 70, the primary sigma factor of
Escherichia coli RNA polymerase. In strains carrying both the mutant and wild-type sigma …

Activation of transcription initiation by the cI protein of phage λ is thought to be mediated by a
direct interaction between cI and RNA polymerase at the P RM promoter. Two negatively …

Oligonucleotide-directed mutagenesis was used to complete a collection of mutations in the-
35 and-10 hexamers of the ant promoter of Salmonella phage P22. The effects of all 36 …

We present a retrospective review of 357 consecutive patients with 419 aneurysms treated
with coil embolization. Although incomplete occlusion and recurrence of intracranial …

Intra-abdominal cysts may arise from a variety of organs. However, foreign-body reaction
and cyst formation should be considered in the differential diagnosis. In this report, we …

Objective Stent-assisted coiling (SAC) of unruptured intracranial aneurysms is a treatment
alternative to clipping or coiling, although high complication and procedure-related mortality …

Background The degree of aneurysm occlusion following coil embolization has an impact on
aneurysm recanalization. Objective To explain the natural history of intracranial aneurysms …

Background and purpose The Penumbra Coil 400 System (PC 400) is the newly introduced
platinum coil system designed specifically to enhance filling efficiency by increasing coil …

Background The initial experience with the large diameter Penumbra Coil 400 (PC400)
system has been positive regarding safety, efficacy, improved packing density and cost …