Patient Maziar Hashemi (L), who has the cancer Myelodysplastic syndrome, and his wife Fereshteh wait after meeting with his transplant doctor at a hospital in Boston, Massachusetts, U.S., March 26, 2018. Hashemi's brother in Iran is a perfect match for a bone-marrow stem-cell transplant, but it is uncertain if his brother can travel to the U.S. from Iran for the procedure because of the travel ban restrictions. Picture taken March 26, 2018. REUTERS/Brian Snyder