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. 2020 Dec 23;13:13111–13119. doi: 10.2147/OTT.S275613

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© 2020 Huang et al.

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Kaplan–Meier analysis of survival probabilities of NPC patients stratified by serum calcium level. (A) Overall survival, (B) disease-free survival, (C) relapse-free survival, (D) distant metastasis-free survival.