A seating structure includes a support structure, a seat supported by the support structure and a backrest pivotally connected to the support structure. The humidity sensor element includes a substrate having a nanocomposite film as sensing material, wherein said nanocomposite film consists of carbon nanotubeperfluorinated polymer with acid functional groups in weight ratio of 0. A holding member is arranged in opposed relation with the mounting unit with the variable output device interposed therebetween. Each clamping stage includes first and second diodes and first and second capacitors common to the various clamping stages. In the practice of the subject invention, and anti-convulsant agent, such as topiramate, is administered to an individual. One or more displayable lists of options are provided to an operator, whereby selecting one item from the list decreases subsequent choices from other lists to only valid or available choices.