P884: POTENTIAL BENEFIT OF POST-TRANSPLANT DOXYCYCLINE IN AL ACHIEVING HEMATOLOGICAL RESPONSE AFTER AUTOLOGOUS STEM CELL TRANSPLANT – LONG TERM FOLLOW UP. (23rd June 2022) - Abdallah, N.; Dispenzieri, A.; Muchtar, E.; Buadi, F.; Kapoor, P.; Lacy, M.; Hwa, Y.; Fonder, A.; Hobbs, M.; Hayman, S.; Leung, N.; Dingli, D.; et al.