1. Pediatric Oncology Surgery Department, National Cancer Center Institute Jose Alencar Gomes da Silva (INCA/RJ), Ministry of Health-Science and Technology, Rio de Janeiro 20230‑130, Brasil
2. Rio de Janeiro State University, (UERJ), Faculty of Medical Sciences, Discipline of Microbiology and Immunology, Laboratory of Diphtheria and Corynebacteria of Clinical Relevance, Rio de Janeiro 20551030, Brasil