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Changes in risk factors of lower respiratory infections attributable to mortality rate among children younger than 5 years in China, 2000–2019. Red solid line: environmental and occupational risk factor in ascending order; red dotted line: environmental and occupational risk factor in descending order; blue solid line: behavioral risk factor in ascending order; blue dotted line: behavioral risk factor in descending order; green solid line: metabolic risk factor in ascending order.
