An exercise can be chronic.Logical formLearned from17 sentences. A war can be chronic.Logical formLearned from17 sentences. Risks can be chronic.Logical formLearned from17 sentences. Invalids can be chronic.Logical formLearned from17 sentences. Back injuries can be chronic.Logical formLearned from17 sentences. Stresses can be chronic.Logical formLearned from17 sentences. An (ethanol exposure) can be chronic.Logical formLearned from17 sentences. A (relapsing nature) can be chronic.Logical formLearned from17 sentences. Back pains can be chronic.Logical formLearned from17 sentences. A sleeplessness can be chronic.Logical formLearned from17 sentences. A (leg pain) can be chronic.Logical formLearned from17 sentences. A person may have chronic headaches.Logical formLearned from17 sentences. Liars can be chronic.Logical formLearned from17 sentences. Some patients can be with chronic (heart failure).Logical formLearned from17 sentences. Persons can be with chronic headaches.Logical formLearned from17 sentences.