An exemplary surgical apparatus may include an anvil including an outer surface, a channel defined therein, and an aperture defined in the outer surface, where the aperture opens to the channel; and a cutter slidable along and within the channel, where at least a portion of the cutter is flexible. The lift cylinder includes an inflatable bag, an inflation port, and an attachment point. The first terminal can be configured to receive, and output, at least one or more signals. The peptides of the present invention can be used for treating cancer. hour and the second heating rate is 5 to 50 C. The method further includes performing at a communication node which has received the group session cryptographic key a propagated pairwise key distribution session with at least one of the communication nodes which has not previously received said group session cryptographic key.