CHICAGO (CBS) —  Two sisters giving the gift of life led to a day of smiles, hugs and hope.

Sisters Hannah and Bethany Goralski decided to donate each donate a kidney to complete strangers back in March in memory of their father, who died of Crohn’s disease.

Loved ones of the people who got their kidneys were so moved they donated kidneys to anonymous people in need, too.

That led to five pairs of donors and recipients who met Monday for the very first time at Northwestern Memorial Hospital. The sisters said they can’t believe it.

“We knew there was a potential for a change,” said Bethany Goralski. “It’s exciting to think that just my kidney didn’t know one person but helped all these people.”

The latest recipients of healthy kidneys have now inspired loved ones willing to donate one of their kidneys to keep the chains going.