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