Described herein is a novel gene and its product, WIP, which associates with WASP. The apparatus and method includes attaching a first locatable element to a first bone on one side of a joint, providing a sensor having a second locatable element and moving the sensor in proximity of the joint to locate a plurality of positions of the sensor relative to the first locatable element using a tracking device. The golf bag cart is movable from an extended configuration to a collapsed configuration, such that the rear wheels pivot about the mid-frame pivots to move towards the front wheel. The first radiation can have a first wavelength band, and the second radiation can have a second wavelength band, which can be substantially different from the first wavelength band. The message may be an advertisement, instructions on using the memory device, or the like, to which the user is at least exposed as a condition of having the full capacity of the memory card available thereafter for use by him or her.