the clinical behavior of asthma varies with age at onset. this study was undertaken to identify associated markers of adult-onset allergic asthma (age ≥20 years).this cross-sectional study compared two groups: 58 patients with asthma onset at <20 years and 66 with onset at ≥20 years. they were compared depending on results of clinical history, and body mass index (bmi), aeroallergen sensitizati...

some scholars have argued that there is a negative correlation between the onset age of l2 acquisition and performance on different measures of l2 knowledge. a kind of biological scheduling is assumed to be responsible for this maturational constraint on language development. the present study asks whether and to what extent critical period effects can be found for universal properties of langu...