the sensitivity of the string test for detection of gastroesophageal reflux was assessed in 15 infants and children , 5 months to 11 years of age ( mean , 2.8 years ) , with vomiting , regurgitation , or lower respiratory tract symptoms , and compared with the barium esophagram , esophageal manometry , and the acid reflux test ( ph probe ) .
C0021270
infants
C0008059
children