Group 2: penicillin combined with β-lactamase inhibitors (amoxicillin-clavulanat, ampicillin-sulbactam) administered as antibiotic prophylaxis.
Nhóm 2: sử dụng KSDP penicillin phối hợp chất ức chế β-lactamase (amoxicillin-clavulanat, ampicillin-sulbactam).