y either a spraying process or dipping process as described above, with or without a carrier), (c) by coating the graft with a substance such as a hydrogel which will in turn absorb the fibrosis-inhibiting composition, (d) constructing the graft itself or a portion of the graft with a fibrosis-inhibiting composition, or (e) by covalently binding the fibrosis-inhibiting agent directly to the graft