Rodes-Cabau J, Horlick E, Ibrahim R, Cheema AN, Labinaz M, Nadeem N, Osten M, Cote M, Marsal JR, Rivest D, Marrero A, Houde C. Effect of clopidogrel and aspirin vs aspirin alone on migraine headaches after transcatheter atrial septal defect closure: the CANOA randomized clinical trial. JAMA. 2015 Nov 24;314(20):2147-54. doi: 10.1001/jama.2015.13919
Donnelly DW, Hegarty A, Sharp L, Carsin AE, Deady S, McCluskey N, Comber H, Gavin A. The impact of adjustment for socioeconomic status on comparisons of cancer incidence between two European countries. J Cancer Epidemiol. 2013 Jan 1;2013:612514. doi: 10.1155/2013/612514