 - A minimum of 4 months is required between last dose of chemotherapy or chemoradiotherapy and study treatment; in addition patients must be progression-free for at least 4 months after completion of chemotherapy or chemoradiotherapy or radiation plus cetuximab given with a curative intent; cetuximab therapy: 4 months is required between last dose of chemotherapy or chemoradiotherapy and study treatment if part of concurrent regimen, 8 weeks if part of adjuvant regimen post radiation 