aUniversity of Health Sciences, Ankara City Hospital, Pediatric Hematology and Oncology Department

bUniversity of Health Sciences, Dr Abdurrahman Yurtaslan Ankara Oncology Hospital, Biochemistry Department, Ankara

cAfyonkarahisar Health Sciences University, Pediatric Hematology and Oncology Department, Afyonkarahisar

dYildirim Beyazit University, Ankara City Hospital, Pediatric Hematology and Oncology Department, Ankara, Turkey

Correspondence to Turan Bayhan, MD, Ankara City Hospital, Pediatric Hematology and Oncology Department, Çankaya, Ankara 06800, Turkey Tel: + 0312 552 60 00; e-mail: [email protected]

Received 6 April, 2021

Revised 8 February, 2022

Accepted 24 February, 2022