When classifying cases into categories of a category system, a classification rule is generated from information obtained from a set of cases classified into categories of another category system and the cases are classified according to the classification rule. Also disclosed are methods for making and using the disclosed sorbents, devices and systems. The mass differential afforded by the difference in alkyl substitution affords a means of pairing individual proteins of one population with those of another while differentiating between the two, using analytical techniques disclosed in the prior art for isotope-coded affinity tagging. Thus, the CPE may be configured with the segment identifier corresponding to the received loopback cell. The delivery module generates a sequenced data segment from the parts of the data file received from the plurality of storage modules and transmits the sequenced data segment to the requester.