Method of preventing or reducing diarrhea andor steatorrhea in HIV-positive patients being treated with High Activity Antiretroviral drugs containing protease inhibitors, nucleoside reverse transcriptase inhibitors or non-nucleoside reverse transcriptase inhibitors. Preferably, the outer portion comprises polytetrafluoroethylene or perfluoroalkoxy. If both flags are not in agreement, then the controller outputs a display control signal to the output unit wherein the display control signal indicates a picture set by the frame rate which differs from the just prior frame rate, and commands the dot clock output unit to switch a dot clock. A Doppler search or other logical control message may likewise be communicated from the processor to a GPS or other positioning receiver. The positionable detent mechanism also includes a disk with an orifice at the center that can be positioned over the post. In one example, a method includes receiving a selection from a user of a position in a captured image, comparing the selected position to objects in the image, selecting whether the selected position is intended to be within an object or outside an object, refining the position based on the selection, and determining a depth for an object corresponding to the refined position.