1. The Heal Clinic, Tulsa, Oklahoma, USA.
2. Foot & Ankle Center, Bryn Mawr, Pennsylvania, USA.
3. HCA-Houston Healthcare Gulf Coast Foot and Ankle Specialists, Webster, Texas, USA.
4. Royal Research Corp, Pembroke Pines, Florida, USA.
5. Kent State University College of Podiatric Medicine, Kent, Ohio, USA.
6. St. Vincent Wound & Hyperbaric Centre, Erie, Pennsylvania, USA.
7. St. Mary's Center for Wound Healing, Athens, Georgia, USA.
8. SerenaGroup Research Foundation, Cambridge, Massachusetts, USA.
9. Martin Foot and Ankle, York, Pennsylvania, USA.
10. Li & Li Statistical Consulting, Toronto, Canada.
11. Armstrong County Memorial Hospital, Kittanning, Pennsylvania, USA.
12. The Foot and Ankle Wellness Center of Western PA, Butler, Pennsylvania, USA.
13. The Wound Treatment Center at Opelousas General Health System, Opelousas, Louisiana, USA.