Ключевые слова: ache, cancer, care, concept, disease, doctor, gastric, gastritis, health, healthy, illness, indigestion, infected, infection, inflammation, inscription, letters, medical, medicine, new, pain, painful, paper, patient, peptic, period, science, sick, sickness, sign, stomach, stomach ulcer, stomachache, suffer, text, treatment, ulcer, ulceration, ulcers, warning, word,