As the sun rises above the St. Johns River and casts a glow on the glass buildings of downtown Jacksonville, Florida, Ann Mackey returns from a walk with her dog Maggie and prepares to attend a book club discussion. It’s moments like these she has come to truly appreciate after treatment for breast cancer and multiple myeloma. Watch: Paying it forward: Florida woman leads support group after CAR-T cell therapy https://www.youtube.com/watch?v=PEMZ_K3DG2Q “I have always said…