This invention is directed toward a peptide corresponding to an immunologically important viral epitope. The arrays are particularly useful for conducting comparative gene expression analyses. The external stimulator comprises circuitry, at least two pre-determined programs, power source and a primary coil. The device and method may also provide a means for making referrals, scheduling appointments, ordering lenses, dispensing lenses andor forwarding prescriptions to eye care professionals or lens manufacturers. The hub simulates wired connection in response to reception of a wireless signal from the wireless device. The barrier can be coupled to a siderail of the patient support to substantially fill a gap adjacent to the siderail.