Distribution of patients according to gestational and post-natal age with the number of patients per analysis performed on gastric residual fluid aspirates collected from neonates (25–32 weeks).

Note that 13 samples were examined under microscope before 5 days of life. On 178 analyzed samples, we created a database of 72 samples tracing clinical information and biological analyzes useful for multifactorial analyzes on 33 infants (Data S2).