I noticed this study has not been placed and I'm surprised, since iron overload is a very big part of thalassemia and aminoglycoside antibiotics if used in someone with iron excess has a very high rate of deafness as a side effect.
“The results suggest that the level of iron is related to aminoglycoside ototoxicity. More iron can create more ototoxicity, and iron deficiency may inhibit aminoglycoside ototoxicity”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3464738/