The invention provides small molecule drugs that are chemically modified by covalent attachment of a water-soluble oligomer. The decoding unit decodes code data, which is obtained by encoding image data with a variable-length code on a line-to-line basis, into the image data. In other embodiments, the symbol width is variable, and the clock rate is also varied based upon the size of the interface symbol width and the operation of the channel. The system further includes a fluid pumping system operably coupled to the power source and configured to selectively provide cooling fluid to the fluid channel for distribution through the fluid distribution ports based on the reflectance parameter. The dividers thereby serve as the top of the locker below and the bottom of the locker above.