Martín-Merino E, Fortuny J, Rivero E, García-Rodríguez LA. Validation of diabetic retinopathy and maculopathy diagnoses recorded in a UK primary care database. Diabetes Care. 2012 Apr;35(4):762-7.
Toback SL, Beigi R, Tennis P, Sifakis F, Calingaert B, Ambrose CS. Maternal outcomes among pregnant women receiving live attenuated influenza vaccine. Influenza Other Respi Viruses. 2012 Jan 1;6(1):44-51.