Genotypes and haplotypes for thirteen polymorphic sites in the 2-adrenergic receptor gene are disclosed. In one aspect, a system router and PSTN unit are coupled with a communications manager to avoid extensive redesign of router components and PSTN components while providing a wireless user with data network and PSTN connectivity. The portion of the body is positioned in the air stream such that the air stream passes unobstructed over opposing surfaces of the capillary member aligned generally transverse to the direction of the air stream. The downstream border of the cavities is oriented parallel to the chord at the head of the moving blade. The belleville washer of this invention has a radially varying thickness which permits the load deflection profile to mimic that of the natural cartilage which is being replaced.