“…Further analysis of the samples showed that three studies included only infants from the neonatal intensive care unit (NICU) [ 12 , 14 , 18 ], one focused on mechanically ventilated children [ 23 ], and two had a surgical focus [ 13 , 25 ]. Six studies related to a single diagnosis or symptom: Congenital Zika Syndrome [ 22 ], isolated Pierre-Robin sequence [ 15 ], laryngomalacia [ 16 ] and gastroesophageal reflux disease (GERD) [ 17 ], cerebral palsy [ 26 ], and prematurity [ 19 ]. The remaining 10 samples varied widely in terms of principal diagnosis [ 10 , 11 , 20 , 21 , 24 , 27 – 31 ] (Table 4 ).…”