Please select the eligibility criteria that correspond to the clinical trial below.
Title: Open Label, Single-Center, Phase 1 Clinical Study to Evaluate the Safety and the Efficacy of PNEUMOSTEM® Treatment in Premature Infants With Bronchopulmonary Dysplasia
Brief Summary: PNEUMOSTEM® is human umbilical cord blood derived mesenchymal stem cells and it is intended to treat premature infants with bronchopulmonary dysplasia. This study is to assess the safety and the efficacy of this study drug.


Options:
A: Inclusion Criteria:

* Birth weight range: 500g\~1250g
* Fetal gestational age: 23 weeks to 29 weeks
* Premature infants who cannot do spontaneous breathing, which ventilation rate is less than 12 breaths per min of ventilation rate and 25% of oxygen demand
* Premature infants who does not improve the breathing or worse within 24 hours prior to enrollment of this study
* Written consent form signed by a legal representative or a parent

Exclusion Criteria:

* Cyanotic or acyanotic congenital heart diseases except patent ductus arteriosus
* Severe lung malformation (i.e. Pulmonary hypoplasia, congenital diaphragmatic hernia, congenital cystic lung disease)
* Severe lung malformation with chromosome anomalies (i.e. Edward syndrome, Patau syndrome, Down syndrome, etc) or severe congenital malformation (Hydrocephalus, Encephalocele, etc)
* Severe congenital infection (i.e. Herpes, Toxoplasmosis, Rubella, Syphilis, AIDS, etc)
* CRP \> 30 mg/dL; Severe sepsis or shock
* Premature infants who is going to or expected to have surgery 72 hours before/after this study drug administration
* Surfactant administration within 24 hours prior to this study drug administration
* Severe intracranial hemorrhage ≥ grade 3 or 4
* Premature infants who have active pulmonary hemorrhage or active air leak syndrome at the time point of screening
* History of other clinical studies as a participant
* Premature infants who are allergic to Gentamicin
* Premature infants who is considered inappropriate by the investigators
B: Inclusion Criteria:

* Mothers must have consented for cord blood collection at delivery
* cord blood must be available for extraction of stem cells.
* \>34 weeks gestation
* cord or neonatal pH\<7.0 or base deficit\>16 milliequivalents per liter (mEq/L) or history of acute perinatal event
* either a 10 minute Apgar \< 5 or continued need for ventilation.
* All infants must have signs of encephalopathy within 6 hours of age.

Exclusion Criteria:

* Inability to enroll by 14 days of age.
* Presence of known chromosomal anomaly.
* Presence of major congenital anomalies.
* Severe intrauterine growth restriction (weight \<1800g)
* Infants in extremis for whom no additional intensive therapy will be offered by attending neonatologist.
* Parents refuse consent.
* Attending neonatologist refuses consent.
* Failure to collect the infant's cord blood and/or laboratory unable to process cord blood.
C: Inclusion Criteria:

* all Infants who enrolled in the Phase 1 PNEUMOSTEM® clinical trial (NCT01297205)

Exclusion Criteria:

* Infants whose parent or legal guardian did not want to participate in the study
D: Inclusion Criteria:

1. gestational age ≥ 34weeks, body weight ≥ 2kg.
2. 1 minute apgar score ≤3, and 5 minutes apgar score ≤5, OR umbilical arterial blood gas potential of hydrogen\<7.0, OR 30 minutes base excess≤-12 mmol/L, OR need for ventilation 5 minutes after birth.
3. All infants must have signs of encephalopathy (such as convulsion, coma, dystonia, abnormal primitive reflex and irregular respiration) within 6 hours of age or continued abnormal EEG for more than 24h.

Exclusion Criteria:

1. Does not meet the inclusion criteria
2. Suffer from other serious organic disease or congenital, hereditary metabolic diseases
3. Intracranial active infection, or neuromuscular damage outside central nervous system
4. potential of hydrogen / electrolyte disorders without improvement or stability
5. Coagulation disorders associated with bleeding tendency
6. Immune function is not perfect
7. Patients or his guardian refuse consent.
8. Patients or his guardian don't accept the follow-up schedule.

Answer: A