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Dyfyniad Arddull ChicagoGenuneit, J., et al. Smoking and the Incidence of Asthma During Adolescence: Results of a Large Cohort Study in Germany. BMJ Group, 2006.
Dyfyniad MLAGenuneit, J., et al. Smoking and the Incidence of Asthma During Adolescence: Results of a Large Cohort Study in Germany. BMJ Group, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.