Further observations on smoker's respiratory syndrome.
D001249:Asthma / Q000209:etiology*; D002118:Calcium / Q000494:pharmacology*; D002136:Calcium, Dietary; D006801:Humans; D012907:Smoking / Q000009:adverse effects*
D002136:Calcium, Dietary; D002118:Calcium
ASTHMA/etiology and pathogenesis; CALCIUM/effects; SMOKING/injurious effects