#1 ('transient tachypnea of the newborn'/exp OR (transient AND tachypnea AND of AND the AND newborn) OR ttn OR ttnb OR 'newborn transient tachypnea' OR (('newborn'/exp OR newborn) AND transient AND ('tachypnea'/exp OR tachypnea)) OR 'newborn transient tachypnoea' OR (('newborn'/exp OR newborn) AND transient AND ('tachypnoea'/exp OR tachypnoea)) OR 'transient tachypnoea' OR (transient AND ('tachypnoea'/exp OR tachypnoea)) OR 'transient tachypnea' OR (transient AND ('tachypnea'/exp OR tachypnea)) OR 'transitory tachypnea' OR (transitory AND ('tachypnea'/exp OR tachypnea)) OR 'transitory tachypnoea' OR (transitory AND ('tachypnoea'/exp OR tachypnoea))) AND [1980‐2019]/py	2283 records
#2 'newborn*':ab,ti OR 'new born':ab,ti OR 'new borns':ab,ti OR 'newly born baby*':ab,ti OR 'babies':ab,ti OR 'premature':ab,ti OR 'prematurity':ab,ti OR 'preterm':ab,ti OR 'pre term':ab,ti OR 'low birth weight':ab,ti OR 'low birthweight':ab,ti OR 'vlbw':ab,ti OR 'lbw':ab,ti OR 'infant':ab,ti OR 'infants':ab,ti OR 'infantile':ab,ti OR 'infancy':ab,ti OR 'neonat*':ab,ti	973156 records
#3 'prematurity'/exp	100903 records
#4 'infant'/exp	1068259 records
#5 #2 OR #3 OR #4	1527607 records
#6 human NOT animal	19716712 records
#7 randomized AND controlled AND trial OR (controlled AND clinical AND trial) OR randomized OR placebo OR (clinical AND trials AND as AND topic) OR randomly OR (clinical AND trial)	2381022 records
#8 #5 And #6 And #7	90738 records
#9 #1 AND #8	167 records (EN)
If the standard RCT filter is removed, the search retrieves 1033 records