Circulating tumour DNA analysis predicts relapse and improves risk stratification in primary refractory multiple myeloma oleh Sridurga Mithraprabhu, John Reynolds, Rose Turner, Hang Quach, Noemi Horvath, Ian Kerridge, Anna Kalff, Krystal Bergin, Jay Hocking, Flora Yuen, Tiffany Khong, Brian M. Durie, Andrew Spencer