The Who has added one more U.S. show to its Quadrophenia and More Tour -- and perhaps the most important one.

The group will close out the tour's second North American leg with a February 28 stop at The Theater at Madison Square Garden in New York as a fundraiser for Teen Cancer America and the Memorial Sloan-Kettering Cancer Center. Elvis Costello & the Imposters will also perform that night.

Teen Cancer America is an outgrowth of the Teenage Cancer Trust Who frontman Roger Daltrey helped found in the U.K. to help cancer victims aged 13-24. The U.S. organization is aligned with the UCLA Medical Center, and Daltrey tells us it was always a goal to get some form of the charity working on this side of the pond:

"It's a very big issue that teenagers as a group aren't recognized within the health system. You're either a child or an adult. That can have huge psychological ramifications for a teenager diagnosed with a serious illness. Getting UCLA on board is a triumph because they are the gold standard of medicine in the U.S....Well, say one or two pieces of the gold standard. So hopefully it will roll out from there."

Tickets for the benefit go on sale at 10 a.m. Saturday (February 2) via Ticketmaster. The Who breaks for a bit after that show before kicking off a European tour on June 8 in Dublin, Ireland.

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