Seasonal variation in birth and death in the mentally handicapped.
Jancar
J
J
D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D015994:Incidence; D008607:Intellectual Disability / Q000209:etiology / Q000401:mortality*; D008297:Male; D012621:Seasons; D014852:Wales / Q000453:epidemiology