When Russian-born Alex contracted leukemia, he contacted Ezer Mizion who found a 10-out-of-10 match on their bone-marrow database. Shlomo (like many Haredi students at Jerusalem’s Meir Yeshiva) had registered his DNA. 9 years later, they met – brothers in arms.

http://www.ezermizion.org/blog/youll-always-be-my-hero/