によって fido sedik 12年前.
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conceptual framework
otitis media
individual
socio-demographic
age
gender
physiology
genetic
congenital malformation
skin disease
allergy
asthma
family
history
otitis media history
family demographic
family size
parents
parenting : breastfeeding practice
income
education
environment
kindergarten / daycare
poor hygiene
overcrowding
secondhand smoker