Povidone-iodine ear wash and oral cotrimoxazole for chronic suppurative otitis media in Australian aboriginal children: study protocol for factorial design randomised controlled tr... oleh Christine Wigger, Amanda Jane Leach, Jemima Beissbarth, Victor Oguoma, Ruth Lennox, Sandra Nelson, Hemi Patel, Mark Chatfield, Kathy Currie, Harvey Coates, Keith Edwards, Heidi Smith-Vaughan, Kim Hare, Paul Torzillo, Steven Tong, Peter Morris