Abnormalities of gastrointestinal motility in children with nonulcer dyspepsia and in children with gastroesophageal reflux disease. - Cucchiara,S.; Bortoletti,M.; Colombo,C.; Boccieri,A.; De Stefano,M.; Vitiello,G.; Pagano,A.; Ronchi,A.; Auricchio,S. (Dig Dis Sci, 1991)