In {TAIL ~ some embodiments}, {HEAD ~ the combination} may further include one or more error checking codes 
In
In { TAIL ~ some embodiments } , { HEAD ~ the combination } may further include one or more error checking codes
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH