Please select the eligibility criteria that correspond to the clinical trial below.
Title: Noninvasive Ventilation for Preterm Neonates With Respiratory Distress Syndrome: a Multi-center Randomized Controlled Trial
Brief Summary: The investigators compared advantages and disadvantages of two forms of noninvasive respiratory support -noninvasive high-frequency oscillatory ventilation (nHFOV) or nasal continuous positive airway pressure (nCPAP) -as a primary mode of ventilation in premature infants with RDS．


Options:
A: Inclusion Criteria:

* Caesarean newborn
* Gestational age ≥ 35 weeks
* Weight ≥ 2 kg
* SaO2 \< 90% after 10 min of life
* Silverman score ≥ 5
* Treated less than 20 min after birth
* Social security affiliation (parents)
* Informed consent signed (parents)

Exclusion Criteria:

* Thoracic retraction
* Congenital intrathoracic malformations
* Meconium aspiration
* Early neonatal infections with hemodynamic troubles
* Severe neonatal asphyxia
* Polymalformative syndrome
B: Inclusion Criteria:

* gestational age between 25+0 and 32+6 weeks;
* birth weight more than 600 g;
* supported with any type of endotracheal ventilation;
* Has not had first attempt at extubation(extubation readiness requires fulfilling of all the following criteria: a. Having received at least one loading dose of 20 mg/kg and 5 mg/kg daily maintenance dose of caffeine citrate; b. pH\>7.20 PaCO2\<=60 mmHg (these may be evaluated by arterialized capillary blood gas analysis or appropriately calibrated transcutaneous monitors. Venous blood gas values cannot be used); c. Paw \<=7-8 cmH2O; d. FiO2\<=0.30; e. sufficient spontaneous breathing effort, as per clinical evaluation).;
* Obtained parental consent. Informed consent will be obtained antenatally or upon neonatal intensive care unit admission.;

Exclusion Criteria:

* major congenital anomalies or chromosomal abnormalities;
* Presence of neuromuscular disease;
* Upper respiratory tract abnormalities; ;
* need for surgery known before the first extubation;
* Grade IV-intraventricular haemorrhage (IVH) occurring before the first extubation
* congenital lung diseases or malformations or pulmonary hypoplasia
C: Inclusion Criteria:

* Greater than 72 hours post-natal age AND currently on NCPAP
* Less than 1,250 g when on NCPAP at time of enrollment

Exclusion Criteria:

* Congenital or acquired abnormality of upper airways
* Severe congenital anomalies including cyanotic congenital heart disease
* Severe nasal excoriation/injury preventing use of NIV interface
* Greater than 2,000 grams at time of randomization
D: Inclusion criteria:

(1)Gestational age (GA) is from 26 to 34 weeks; (2) diagnosis of RDS. The diagnosis of RDS will be based on clinical manifestations (tachypnea, nasal flaring and or grunting) and chest X-ray findings; (3) RDS Silverman score\>5; (4) informed parental consent has been obtained.

Exclusion criteria

(1) severe RDS requiring early intubation according to the American Academy of Pediatrics guidelines for neonatal resuscitation7; (2)major congenital malformations or complex congenital heart disease; (3) group B hemolytic streptococcus pneumonia, septicemia, pneumothorax, pulmonary hemorrhage; (4) cardiopulmonary arrest needing prolonged resuscitation; (5) transferred out of the NICUs without treatment.

Answer: D