GERD
IBS
Food allergy
Malabsorption
Pyloric stenosis
Gastrointestinal atresia or malformation
Inborn errors of metabolism
Thyroid disease
Chronic infection or immunodeficiency
Chronic pulmonary disease
Congenital heart disease or heart<unk> 
Malignancy
Celiac disease
Inflammatory bowel disease
Breastfeeding problem (latching, suckling, or swallowing)
Improper formula preparation
Caregiver depression
Lack of food availability
Cleft lip/palate
Mood disorder
Eating disorder
Child neglect or child abuse
Failure to thrive 
GERD
Stridor
IBS
Stridor 
Food allergy
Hiccups
Malabsorption