1. “Marie S. Curie” Emergency Children’s Clinical Hospital, Carol Davila University of Medicine and Pharmacy, 041451 Bucharest, Romania
2. National Institute for Mother and Child Health “Alessandrescu-Rusescu”, Carol Davila University of Medicine and Pharmacy, 041249 Bucharest, Romania
3. Dr. Victor Gomoiu Clinical Children Hospital, Carol Davila University of Medicine and Pharmacy, 022102 Bucharest, Romania
4. Sfanta Maria Clinica Hospital, Carol Davila University of Medicine and Pharmacy, 011172 Bucharest, Romania