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Celebrity Trainer Gunnar Peterson Reveals His 4-Year-Old Daughter Is Battling Leukemia

The famed trainer shared the heartbreaking news to Instagram on Wednesday.

Peterson shared a series of photos showing his young daughter resting in a hospital bed, and revealed that she is battling for her life after being diagnosed with leukemia. The final pic in the series showed Monroe laying in her hospital bed with her 7-year-old brother and her dad, who was hugging a stuffed unicorn. The post was met with an overwhelming wave of love and support from many of the celebs Peterson has worked with and befriended over the years, including Khloe Kardashian, who commented, "Oh my heart!!

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