I-130 DNA test for 'sibling'

has anyone here done and succeed with DNA test when petition for a relative that has no document proof for relationship who currently live outside of US? I was online going thru I-130 and notice the DNA result upload.

Any tips or info to timing, challenges, cost?

submitted by /u/nd289
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source https://www.reddit.com/r/immigration/comments/pdlxqu/i130_dna_test_for_sibling/

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