Preparation for the breath test involves abstaining from certain medications for several weeks and fasting food and water a few hours before the test. The test is safe during pregnancy and for ...
Asymptomatic Subjects. Sixty-five healthy, asymptomatic volunteers aged 54.2 ± 2.0 years (mean ± SEM; range 20 86 years) were involved in the present study. All subjects were initially screened for H.