Qing-jie Yi

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OBJECTIVE To investigate penis development in children and adolescents aged 0-16 years, and to plot the percentile curve for penis development in different age groups. METHODS A total of 3 024 normal male neonates, children, and adolescents aged 0-16 years in Chongqing, China were selected by simple random sampling and stratified cluster sampling. The(More)
OBJECTIVE To compare the current two flu outbreak reporting standards for the purpose of better prevention and control of flu outbreaks. METHODS A susceptible-exposed-infectious/asymptomatic-removed (SEIAR) model without interventions was set up first, followed by a model with interventions based on real situation. Simulated interventions were developed(More)
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