The Hackett Hemwall Patterson Foundation (HHPF), founded in 1969, is a service organization that provides medical care and materials to underserved people in Honduras and Mexico. HHPF doubles as an educational organization that provides state of the art training in prolotherapy, a regenerative medical therapy for chronic pain. Here you'll find information about the Foundation and our activities, including our annual university-affiliated prolotherapy conference held in October on the UW-Madison campus.