I'm a bit confused by the question, but the confounders are huge.
If you take young men and women into a war zone, deprive them of sleep and maybe dehydrate them, with the heightened stress and being away from their family.... We also have epidemiological data that shows a higher incidence of adverse childhood effects. When you take these people over and expose them to the horrors of war—Rwanda in my circumstance—or humanitarian crises, trying to tease out the difference between the trauma, the mefloquine and the doxycycline is a very difficult thing to do. That's why we have, as the general puts it, not great evidence on both sides.
I think the definitive study would be extremely difficult. I think ultimately as health care practitioners we need to listen to our patients and help them to deal with what they're struggling with.
There isn't a specific treatment that I know of for tinnitus caused by mefloquine, but I do know approaches to tinnitus that we would use, for example. I think what we need to do is have people come forward, compassionately listen to what they're feeling, and then try to address things almost with a symptom-based approach.