> It either works or it doesn't. No, not really. What the criteria for starting/stopping treatment are (e.g. is it being given to early or late stage patients)

> It either works or it doesn't. No, not really. What the criteria for starting/stopping treatment are (e.g. is it being given to early or late stage patients), what other treatments/drugs are also used, what dosage is used, etc can all effect this.