A novel amphiphilic lipid compound having a cleavable, vinyl ether linked hydrophilic headgroup is described. Various embodiments include mesh support devices, devices using straps, spiral-shaped devices, catheter-based devices and related methods. The computer rejects access to the data for an additional user, wherein the additional user has been determined not to be within a publication range of the data, even though the user is within a publication range of the community to which the data belongs.