oesophageal motility and lower oesophageal sphincter ( los ) competence were investigated in 13 patients with progressive systemic sclerosis ( pss ) and in 16 patients with localized scleroderma ( ls ) by means of oesophageal manometry and 24-h ph monitoring of the distal oesophagus .
C0227192
lower oesophageal sphincter
C0014876
oesophagus