According to {HEAD ~ another aspect} of {TAIL ~ the invention}, a method of operating a fuel cell is disclosed 
of
According to { HEAD ~ another aspect } of { TAIL ~ the invention } , a method of operating a fuel cell is disclosed
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH