Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, 3401 N. Broad St, Suite C-501. Philadelphia, PA, 19140, USA. Electronic address: Roman.Petrov@tuhs.temple.edu. Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, 3401 N. Broad St, Suite C-501. Philadelphia, PA, 19140, USA. Gastroenterology Medicine, Lewis Katz School of Medicine at Temple University. 3401 N. Broad St. Gi Section. Philadelphia, PA, 19140, USA.