This invention relates to the discovery of novel polymorphic forms of naltrexone, including solvates, hydrates, anhydrous and other crystalline forms and combinations thereof. Two or more fluorescent labels can be attached to the targeted cells, and distinguished from one another by a color camera. The cache is flushed to the persistent medium of the second disk drive before resuming normal IO request processing. The tray includes a first and second side panel, a first and second bottom panel, a first and second divider panel, and a first and second end panel. The first and second lower occlusion arms define a lower main body width dimension.