A Cambodian cupping practitioner prepares the glass cups for treating her costumer at a traditional medicine cupping clinic in Phnom Penh, Cambodia, Wednesday, August 10, 2016. U.S. olympic gold medal winner Michael Phelps made the world aware of cupping by showing his marked muscular shoulders before diving into the pool at the Rio games recently, but cupping, and a similar treatment known as coining, have been practiced in East Asia for centuries. (Photo by Heng Sinith/AP Photo)
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