To test whether altered radiation fractionation schemes ( hyperfractionation -LSB- HFX -RSB- , accelerated fractionation , continuous -LSB- AFX-C -RSB- , and accelerated fractionation with split -LSB- AFX-S -RSB- ) improved local-regional control ( LRC ) rates for patients with squamous cell cancers ( SCC ) of the head and neck when compared with standard fractionation ( SFX ) of @ Gy .