Helping pregnant smokers quit: a multi-centre randomised controlled trial of electronic cigarettes versus nicotine replacement therapy oleh Przulj Dunja, Pesola Francesca, Myers Smith Katie, McRobbie Hayden, Coleman Tim, Lewis Sarah, Griffith Christopher, Walton Robert, Whitemore Rachel, Clark Miranda, Ussher Michael, Sinclair Lesley, Seager Emily, Cooper Sue, Bauld Linda, Naughton Felix, Sasieni Peter, Manyonda Isaac, Hajek Peter