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Breastfeeding --- Breast Feeding. --- Developed Countries. --- Evidence-Based Medicine --- Treatment Outcome. --- methods.

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Vitamin D --- Vitamin D --- Calcium --- Calcium --- Nutrition --- Health status indicators --- Secosteroids --- Health Surveys --- Metals, Alkaline Earth --- Biological Science Disciplines --- Blood Coagulation Factors --- Nutritional Physiological Phenomena --- Steroids --- Biological Factors --- Physiological Phenomena --- Natural Science Disciplines --- Elements --- Metals --- Data Collection --- Inorganic Chemicals --- Epidemiologic Methods --- Health Care Evaluation Mechanisms --- Polycyclic Compounds --- Quality of Health Care --- Public Health --- Investigative Techniques --- Health Care Quality, Access, and Evaluation --- Diagnostic Techniques and Procedures. --- Environment and Public Health --- Health Care --- Vitamin D --- Health Status Indicators --- Calcium --- Statistics as topic. --- Nutritional Requirements --- Physiology --- Physiological effect --- Dose-response relationship --- Physiological effect --- Dose-response relationship --- Requirements --- Evaluation

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Controlled Clinical Trials as Topic --- Respiratory Tract Infections --- Bacterial Infections and Mycoses --- Disease Attributes --- Paranasal Sinus Diseases --- Diseases --- Clinical Trials as Topic --- Nose Diseases --- Respiratory Tract Diseases --- Pathologic Processes --- Epidemiologic Studies --- Otorhinolaryngologic Diseases --- Evaluation Studies as Topic --- Pathological Conditions, Signs and Symptoms --- Epidemiologic Methods --- Investigative Techniques --- Health Care Evaluation Mechanisms --- Quality of Health Care --- Diagnostic Techniques and Procedures. --- Public Health --- Health Care Quality, Access, and Evaluation --- Environment and Public Health --- Health Care --- Randomized Controlled Trials as Topic --- Bacterial Infections --- Sinusitis --- Acute Disease

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Vitamin D --- Vitamin D --- Calcium --- Calcium --- Nutrition --- Health status indicators --- Secosteroids --- Health Surveys --- Metals, Alkaline Earth --- Biological Science Disciplines --- Blood Coagulation Factors --- Nutritional Physiological Phenomena --- Steroids --- Biological Factors --- Physiological Phenomena --- Natural Science Disciplines --- Elements --- Metals --- Data Collection --- Inorganic Chemicals --- Epidemiologic Methods --- Health Care Evaluation Mechanisms --- Polycyclic Compounds --- Quality of Health Care --- Public Health --- Investigative Techniques --- Health Care Quality, Access, and Evaluation --- Diagnostic Techniques and Procedures. --- Environment and Public Health --- Health Care --- Vitamin D --- Health Status Indicators --- Calcium --- Statistics as topic. --- Nutritional Requirements --- Physiology --- Human Anatomy & Physiology --- Health & Biological Sciences --- Animal Biochemistry --- Physiological effect --- Dose-response relationship --- Physiological effect --- Dose-response relationship --- Requirements --- Evaluation

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Colon (Anatomy) --- Evidence-based medicine --- Clinical Medicine --- Colorectal Neoplasms --- Investigative Techniques --- Analytical, Diagnostic and Therapeutic Techniques and Equipment --- Neoplastic Syndromes, Hereditary --- DNA Repair-Deficiency Disorders --- Study Characteristics --- Evidence-Based Practice --- Medicine --- Genetic Diseases, Inborn --- Publication Characteristics --- Intestinal Neoplasms --- Neoplasms --- Colonic Diseases --- Metabolic Diseases --- Health Occupations --- Gastrointestinal Neoplasms --- Diseases --- Intestinal Diseases --- Disciplines and Occupations --- Nutritional and Metabolic Diseases --- Congenital, Hereditary, and Neonatal Diseases and Abnormalities --- Gastrointestinal Diseases --- Digestive System Neoplasms --- Digestive System Diseases --- Neoplasms by Site --- Meta-Analysis --- Colorectal Neoplasms, Hereditary Nonpolyposis --- Evidence-Based Medicine --- Diagnosis --- Methods --- Health & Biological Sciences --- Oncology --- Cancer