Furthermore, {TAIL ~ the stabilizing effects} of {HEAD ~ the covering} make the mattress stationary for surgical operations 
Furthermore , { TAIL ~ the stabilizing effects } of { HEAD ~ the covering } make the mattress stationary for surgical operations
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH