"author","treatment","r","N"
"Boyd 1997","Salmeterol",1,229
"Boyd 1997","Placebo",1,227
"Calverly 2003","Fluticasone",4,374
"Calverly 2003","Salmeterol",3,372
"Calverly 2003","SFC",2,358
"Calverly 2003","Placebo",7,361
"Celli 2003","Salmeterol",1,554
"Celli 2003","Placebo",2,270
