An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. Therefore, a correspondence between the actual physical disk and the distributed RAIDs can be obtained. Since the composition can release SDF-1, a chemokine which is a capable of promoting accumulation of vascular progenitor cells in vivo, in the sustained manner, it can be useful for treatment andor suppression of symptom progression of ischemic disease or bone disease, as pharmaceutical preparations in various formulations.