The invention includes, in part, a method of selecting a subject having cancer for treatment with a JAK/STAT inhibitor and a method of determining if a therapeutically effective dose of a JAK/STAT inhibitor has been administered.本發明部分地包括選擇患有癌症之個體以利用JAK/STAT抑制劑進行治療之方法,以及測定是否已投與治療有效劑量之JAK/STAT抑制劑之方法。