Non-parental caregivers, low maternal education, gastrointestinal problems and high blood lead level: predictors related to the severity of autism spectrum disorder in Northeast China
Abstract Background The prevalence of autism spectrum disorder (ASD) has increased rapidly in recent years.Environmental factors may play an important role in the pathogenesis of ASD.These factors may include socioeconomic factors, nutritional factors, heavy metal exposure, face cream air pollution, etc.Our aim is to analyze possible environmental