Southwest Oncology Group (SWOG) performance status >= 2.0 Southwest Oncology Group (SWOG)/Eastern Cooperative Oncology Group (ECOG) performance score >= 2 Southwest Oncology Group (SWOG) performance status 0-1 Karnofsky performance scale (KPS) >= 70% or Southwestern Oncology Group (SWOG) performance status 0 or 1 Southwest Oncology Group (SWOG) performance status >= 2.0 Southwest Oncology Group (SWOG) performance status >= 2.0 South Western Oncology Group (SWOG) performance status 0-2 Southwestern Oncology Group (SWOG) performance status >= 2.0 Southwest Oncology Group (SWOG) performance status 0 or 1 Southwestern Oncology Group (SWOG) performance status 0 or 1 Eastern Cooperative Oncology Group (ECOG)/Zubrod/ Southwest Oncology Group (SWOG) performance status < 2 (Karnofsky performance status >= 70%) Southwestern Oncology Group (SWOG) performance status of 0 – 2 Eastern Cooperative Oncology Group (ECOG)/Zubrod/Southwestern Oncology Group (SWOG) performance status < 2 (Karnofsky performance status >= 70%)