adverse ae sodium potassium calcium values event terminology common version unresolved toxicities grade criteria ctcae alopecia terminology common exception adverse adverse events recovery supportive toxicities ctcae terminology common nonsignificant version common terminology ctcae adverse events grade criteria version diarrhea toxicity toxicities terminology common ctcae alopecia adverse grade events criteria version unresolved toxicity common terminology ctcae adverse events alopecia grade cancer adverse events ctcae terminology common grade criteria recovered prior alopecia dehydration grade nci ctcae exacerbated ctc version conditions common opinion