Five compared with six fractions per week of conventional radiotherapy of squamous-cell carcinoma of head and neck: DAHANCA 6&7 randomised controlled trial. - Overgaard, Jens; Hansen, Hanne Sand; Specht, Lena; Overgaard, Marie; Grau, Cai; Anderson, Elo; Bentzen, Jens; Bastholt, Lars; Hansen, Olfred; Johansen, Jørgen; Anderson, Lisabeth; Evensen, Jan F. (Lancet, 2003)