Whither the Bernstein test?
Massey
Benson T
BT
D012634:Bodily Secretions; D003938:Diagnostic Techniques, Digestive System; D004947:Esophagus / Q000378:metabolism*; D006356:Heartburn / Q000175:diagnosis / Q000378:metabolism*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D018670:Monitoring, Ambulatory; D012720:Severity of Illness Index