1. Faculty of Midwifery and Nursery, University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania
2. Neonatology Department, Clinical Hospital of Obstetrics and Gynecology “Prof. Dr. P. Sârbu”, 060251 Bucharest, Romania
3. Pediatrics Department, National Institute for Mother and Child Health “Alessandrescu-Rusescu”, 010024 Bucharest, Romania
4. Department of Obstetrics-Gynecology and Neonatology, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
5. Department of Neonatology, Premiere Hospital, Regina Maria Health Network, 300643 Timișoara, Romania
6. Pediatrics Department, Pediatric Hospital Ploiești, 100097 Ploiești, Romania