Survey 7 shows 2GB has held its lead in the Sydney radio ratings.
With treatment now underway, Brohman expects to step back from on-air duties.
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Individual and corporate donations can be made by visiting 2GB.com or calling 1300 31 24 94.
Listeners can tune into 2GB from 1:00pm AEDT on Wednesday, 19 November, for the full broadcast coverage
'It's extraordinary.'
2GB delivered a strong performance, jumping from 11.4 to 14.2 to reclaim its position at the top of the market.
