{HEAD ~ Fabric tube} 50 is preferably made from {TAIL ~ a biocompatible material} such as polyester fabric 
is preferably made from
{ HEAD ~ Fabric tube } 50 is preferably made from { TAIL ~ a biocompatible material } such as polyester fabric
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH