HRH2 and gastroesophageal reflux disease: Despite multiple attempts to contact the parents of the study subjects by telephone or mail, only 17 of the 38 infants returned for a second PFT about six months after being prescribed therapies for their swallowing dysfunction (changes in positioning, changes/modifications to utensils including bottle/nipple systems, and modifications to the viscosity of liquids by thickening them), and, if present, for GER (use of inhibitors of histamine H2 receptors or proton pump inhibitors).