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The comedian Rob Delaney has written about the pain of losing his son.

Henry Delaney died at the age of two old due to a brain tumour.

In ‘A Heart That Works’ Rob Delaney writes about coming to terms with every parent’s worst nightmare - the death of a child.

He spoke to Today’s Martha Kearney about why he felt it was important to write about what happened to his son and his family.

(Image, Rob Delaney, Credit, Tricia Yourkevich/Â鶹Éç)