CLEVELAND -- University Hospitals of Cleveland Tuesday announced a $5 million gift for research and treatment of the skin disease psoriasis.

The gift comes from the Murdough Foundation, whose President Thomas Murdough Jr. founded the toy companies Little Tykes and Step-Two. Murdough also serves as a University Hospitals trustee.

Murdough said the goal is to make University Hospitals a world leader in psoriasis. Psoriasis victims suffer from sometimes severe cases of itchy, inflamed skin.

According to a University Hospitals press release, the gift is the largest known in the U.S. for dermatology at an academic medical center.

An estimated 6 million Americans suffer from psoriasis.