Until recently, people aged 70 and older diagnosed with leukemia and other blood cancers were often considered ineligible for a stem cell transplant.

For 20 years, Heather Bucalos has worked as a nurse in specialty areas that include high-risk obstetrics, student health and orthopedics.

Take a moment to think about how long it takes to walk from one area of your home to another, both in terms of distance and time. It’s such a relatively easy task that it’s almost done without thinking.