TY - STAND AU - P. Thompson AU - R. Gilbert AU - P. Long AU - S. Saxena AU - M. Sharland AU - I. Wong BT - Pediatrics DO - 10.1542/peds.2007-3349 M1 - 2 PY - 2009 SP - 424 EP - 30 T2 - Pediatrics TI - Effect of antibiotics for otitis media on mastoiditis in children: a retrospective cohort study using the United kingdom general practice research database VL - 123 SN - 0031-4005 ER -