1. West Suburban Medical Center, Oak Park, IL, USA
2. University of Kentucky College of Medicine, Lexington, KY, USA
3. Khyber Medical College, Peshawar, Khyber Pakhtunkhwa, Pakistan
4. Peshawar Medical College, Peshawar, Khyber Pakhtunkhwa, Pakistan
5. Vassar Brothers Medical Center, Poughkeepsie, NY, USA