Variability of definition of high‐risk multiple myeloma across phase III clinical trials oleh Faris Jamal Abu Za'nouneh, Obada Ababneh, Carolina Schinke, Sharmilan Thanendrarajan, Maurizio Zangari, John D. Shaughnessy Jr, Fenghuang Zhan, Frits vanRhee, Samer Al Hadidi