About Southern Portal Bone And Joint . Business Hours: Monday - Friday 7:00 am - 5:00 pm. mong 3 subgroups of patients with a higher risk of infection (diabetes, body mass index ≥35 kg/m2, and American Society of Anesthesiologists classification ≥3), and to evaluate the association between the use of ABC and the risks of aseptic revision and revision for aseptic loosening..