rokers loop dus dubbel die gevaar om ernstiger simptome te ontwikkel as mense wat nog nooit gerook het nie, sê dr catherine egbe, 'n spesialiswetenskaplike by die suidafrikaanse mediese navorsingsraad se eenheid vir alkohol, tabaken dwelmnavorsing.

as such, smokers are twice as likely to suffer more serious symptoms than people who have never smoked, says dr catherine egbe, a specialist scientist at the south african medical research council’s alcohol, tobacco and other drug research unit.
