title: N of 1 trials. Research is needed into why such trials are not more widely used.
authors: M
authors: M
authors: Porta
authors: F
authors: F
authors: Bolumar
authors: I
authors: I
authors: Hernandez
authors: J
authors: J
authors: Vioque
mesh_terms: D015982:Bias; D018592:Cross-Over Studies; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000188:drug therapy; D016032:Randomized Controlled Trials as Topic / Q000379:methods; D013806:Theophylline / Q000627:therapeutic use
chemical_list: D013806:Theophylline