Departments of Pediatric Infectious Disease (Drs Ekemen Keles, Kara Aksay, Sahin, and Ustundag) and Medical Biochemistry (Dr Colak) and Clinic of Microbiology (Dr Yilmaz), Health Sciences University, Tepecik Training and Research Hospital, Izmir, Turkey; and Department of Pediatric Infectious Disease, Izmir Katip Celebi University, Izmir, Turkey (Dr Yilmaz Ciftdoğan).

Correspondence: Yildiz Ekemen Keles, MD, Department of Pediatric Infectious Disease, Health Sciences University, Tepecik Training and Research Hospital, Gaziler St No. 468, 35020 Yenisehir Konak, İzmir, Turkey ([email protected]).

The authors express their gratitude to all the technicians working in their hospital and those who are working in the department of biochemistry.

The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article.