Caleb Back is a living miracle. 
He and his twin brother Joshua were born 10 weeks premature.  At birth, Caleb was severely underweight at only 800 grams due to twin to twin transfusion syndrome where the twins receive an unequal share of nutrients which affects their growth.  
That was 14 years ago. 
These days nothing is holding this typical teenager down, he has a busy school schedule and a love of computer games and sailing.
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