Swimming and grommets.
Pringle
M B
MB
D001424:Bacterial Infections / Q000517:prevention & control; D002648:Child; D004427:Ear Diseases / Q000382:microbiology / Q000517:prevention & control; D004432:Ear, Middle; D006801:Humans; D008876:Middle Ear Ventilation; D011183:Postoperative Complications / Q000517:prevention & control; D013550:Swimming