Chronic pain may undergo an undertreatment.Logical formLearned from9 sentences. Features can be chronic.Logical formLearned from9 sentences. Criteria can be chronic.Logical formLearned from9 sentences. A group can be chronic.Logical formLearned from9 sentences. Children can be with chronic cough.Logical formLearned from9 sentences. A (condition management) can be chronic.Logical formLearned from9 sentences. Occupational diseases can be chronic.Logical formLearned from9 sentences. A disadvantage can be chronic.Logical formLearned from9 sentences. A (joint pain) can be chronic.Logical formLearned from9 sentences. An expression can be chronic.Logical formLearned from9 sentences. An intestinal disease can be chronic.Logical formLearned from9 sentences. An (alcohol ingestion) can be chronic.Logical formLearned from9 sentences. (Food shortages) can be chronic.Logical formLearned from9 sentences. Areas can be chronic.Logical formLearned from9 sentences. (Childhood diseases) can be chronic.Logical formLearned from9 sentences.