The clearance effect of bovine anti-Helicobacter pylori antibody-containing milk in O blood group Helicobacter pylori-infected patients: a randomized double-blind clinical trial

Table 2 Symptom questionnaires

+++ Symptom interferes with normal activity >50% of evaluated time, ++ symptom interferes with normal activity <50% of evaluated time, + symptom does not interfere with normal activity, – without symptoms.

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