For relapsed/refractory myeloma, how long of a disease-free interval from first autologous transplant do you recommend before considering a second autologous transplant?

This is an excellent question, and I appreciate Dr. @Dr. First Last's choice of "second ASCT" and not "salvage ASCT" - I still catch myself saying the latter, but the wording is as patient-unfriendly as it gets.

When considering a second ASCT (whether with repeat collection or with cells saved up fro...