LOS ANGELES (KABC) -- As part of our support for Good Morning America's "One Match, Second Chance" campaign, ABC7 partnered with the "Be the Match" for bone marrow donor registry at Loyola Marymount University.
A diverse crowd of LMU students signed up to be potential donors.
"We reach out to our friends. We reach out to classmates," said student Aidan Pidgeon.
Pidgeon says persuading busy college students to sign up can be challenging, but you only have to look at GMA's Robin Robert's struggle with a life threatening blood disorder to understand how a small sacrifice can go a long way.
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Roberts matched with her sister, and the odds of matching with a sibling is 1-in-4 at 24%. When you can't find a match with a relative, one looks to the "Be the Match" bone marrow registry.
The hope is that someone who has blood cancer or bone marrow disease will find their perfect match and find their genetic twin.
Since Roberts' bone marrow procedure, doctors have perfected a method in which a patient can be saved with a related half match.
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"I have had friends and family in the past who had given by bone marrow as well, and I just thought it'd be a really important thing to do," Pidgeon said.
Chelsea Brown put her name down on the registry because she wanted to be able to give if she could.
"I put myself on the registry because I wanted to be able to to give if I could and I want people to know that it really does matter, that the people are generous in that way, and it can change lives and it can save lives and I watched it happen and so I'm happy to to be on the in the database," Brown said.
For blood cancer patients and others with bone marrow related diseases, finding a match is difficult.
Kathryn Lopez for "Be the Match" said they're matching genetic traits and they're trying to find their patients' genetic twin to see if they'd be interested in donating.
The odds of matching range from 29% to 79%, depending on race and ethnicity.
"We don't have enough people in the registry coming from those backgrounds and adding themselves to the registry to see if they could potentially become a match," Lopez said.
Your odds of finding an unrelated match drops significantly if you are Black, Asian, Latino or Native American.
You can save a life from the comfort of your own couch by going to the "Be the Match" website.